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cos^2(x)+cos^2(3x)=1

Solución

cos^{2} (x) + cos^{2} (3 x) = 1

Solución

x = 0.78539 \dots + 2 πn, x = 2 π - 0.78539 \dots + 2 πn, x = 2.35619 \dots + 2 πn, x = - 2.35619 \dots + 2 πn, x = 0.39269 \dots + 2 πn, x = 2 π - 0.39269 \dots + 2 πn, x = 2.74889 \dots + 2 πn, x = - 2.74889 \dots + 2 πn, x = 1.17809 \dots + 2 πn, x = 2 π - 1.17809 \dots + 2 πn, x = 1.96349 \dots + 2 πn, x = - 1.96349 \dots + 2 πn

Grados

x = 4 5^{\circ} + 36 0^{\circ} n, x = 31 5^{\circ} + 36 0^{\circ} n, x = 13 5^{\circ} + 36 0^{\circ} n, x = - 13 5^{\circ} + 36 0^{\circ} n, x = 22. 5^{\circ} + 36 0^{\circ} n, x = 337. 5^{\circ} + 36 0^{\circ} n, x = 157. 5^{\circ} + 36 0^{\circ} n, x = - 157. 5^{\circ} + 36 0^{\circ} n, x = 67. 5^{\circ} + 36 0^{\circ} n, x = 292. 5^{\circ} + 36 0^{\circ} n, x = 112. 5^{\circ} + 36 0^{\circ} n, x = - 112. 5^{\circ} + 36 0^{\circ} n

Pasos de solución

cos^{2} (x) + cos^{2} (3 x) = 1

Restar

1

de ambos lados

cos^{2} (x) + cos^{2} (3 x) - 1 = 0

Re-escribir usando identidades trigonométricas

- 1 + cos^{2} (3 x) + cos^{2} (x)

cos (3 x) = 4 cos^{3} (x) - 3 cos (x)

cos (3 x)

Re-escribir usando identidades trigonométricas

cos (3 x)

Reescribir como

= cos (2 x + x)

Utilizar la identidad de suma de ángulos:

cos (s + t) = cos (s) cos (t) - sin (s) sin (t)

= cos (2 x) cos (x) - sin (2 x) sin (x)

Utilizar la identidad trigonométrica del ángulo doble:

sin (2 x) = 2 sin (x) cos (x)

= cos (2 x) cos (x) - 2 sin (x) cos (x) sin (x)

Simplificar

cos (2 x) cos (x) - 2 sin (x) cos (x) sin (x) : cos (x) cos (2 x) - 2 sin^{2} (x) cos (x)

cos (2 x) cos (x) - 2 sin (x) cos (x) sin (x)

2 sin (x) cos (x) sin (x) = 2 sin^{2} (x) cos (x)

2 sin (x) cos (x) sin (x)

Aplicar las leyes de los exponentes:

a^{b} \cdot a^{c} = a^{b + c}

sin (x) sin (x) = sin^{1 + 1} (x)

= 2 cos (x) sin^{1 + 1} (x)

Sumar:

1 + 1 = 2

= 2 cos (x) sin^{2} (x)

= cos (x) cos (2 x) - 2 sin^{2} (x) cos (x)

= cos (x) cos (2 x) - 2 sin^{2} (x) cos (x)

= cos (x) cos (2 x) - 2 sin^{2} (x) cos (x)

Utilizar la identidad trigonométrica del ángulo doble:

cos (2 x) = 2 cos^{2} (x) - 1

= (2 cos^{2} (x) - 1) cos (x) - 2 sin^{2} (x) cos (x)

Utilizar la identidad pitagórica:

cos^{2} (x) + sin^{2} (x) = 1

sin^{2} (x) = 1 - cos^{2} (x)

= (2 cos^{2} (x) - 1) cos (x) - 2 (1 - cos^{2} (x)) cos (x)

Expandir

(2 cos^{2} (x) - 1) cos (x) - 2 (1 - cos^{2} (x)) cos (x) : 4 cos^{3} (x) - 3 cos (x)

(2 cos^{2} (x) - 1) cos (x) - 2 (1 - cos^{2} (x)) cos (x)

= cos (x) (2 cos^{2} (x) - 1) - 2 cos (x) (1 - cos^{2} (x))

Expandir

cos (x) (2 cos^{2} (x) - 1) : 2 cos^{3} (x) - cos (x)

cos (x) (2 cos^{2} (x) - 1)

Poner los parentesis utilizando:

a (b - c) = ab - a c

a = cos (x), b = 2 cos^{2} (x), c = 1

= cos (x) 2 cos^{2} (x) - cos (x) 1

= 2 cos^{2} (x) cos (x) - 1 cos (x)

Simplificar

2 cos^{2} (x) cos (x) - 1 \cdot cos (x) : 2 cos^{3} (x) - cos (x)

2 cos^{2} (x) cos (x) - 1 cos (x)

2 cos^{2} (x) cos (x) = 2 cos^{3} (x)

2 cos^{2} (x) cos (x)

Aplicar las leyes de los exponentes:

a^{b} \cdot a^{c} = a^{b + c}

cos^{2} (x) cos (x) = cos^{2 + 1} (x)

= 2 cos^{2 + 1} (x)

Sumar:

2 + 1 = 3

= 2 cos^{3} (x)

1 \cdot cos (x) = cos (x)

1 cos (x)

Multiplicar:

1 \cdot cos (x) = cos (x)

= cos (x)

= 2 cos^{3} (x) - cos (x)

= 2 cos^{3} (x) - cos (x)

= 2 cos^{3} (x) - cos (x) - 2 (1 - cos^{2} (x)) cos (x)

Expandir

- 2 cos (x) (1 - cos^{2} (x)) : - 2 cos (x) + 2 cos^{3} (x)

- 2 cos (x) (1 - cos^{2} (x))

Poner los parentesis utilizando:

a (b - c) = ab - a c

a = - 2 cos (x), b = 1, c = cos^{2} (x)

= - 2 cos (x) 1 - (- 2 cos (x)) cos^{2} (x)

Aplicar las reglas de los signos

- (- a) = a

= - 2 \cdot 1 cos (x) + 2 cos^{2} (x) cos (x)

Simplificar

- 2 \cdot 1 \cdot cos (x) + 2 cos^{2} (x) cos (x) : - 2 cos (x) + 2 cos^{3} (x)

- 2 \cdot 1 cos (x) + 2 cos^{2} (x) cos (x)

2 \cdot 1 \cdot cos (x) = 2 cos (x)

2 \cdot 1 cos (x)

Multiplicar los numeros:

2 \cdot 1 = 2

= 2 cos (x)

2 cos^{2} (x) cos (x) = 2 cos^{3} (x)

2 cos^{2} (x) cos (x)

Aplicar las leyes de los exponentes:

a^{b} \cdot a^{c} = a^{b + c}

cos^{2} (x) cos (x) = cos^{2 + 1} (x)

= 2 cos^{2 + 1} (x)

Sumar:

2 + 1 = 3

= 2 cos^{3} (x)

= - 2 cos (x) + 2 cos^{3} (x)

= - 2 cos (x) + 2 cos^{3} (x)

= 2 cos^{3} (x) - cos (x) - 2 cos (x) + 2 cos^{3} (x)

Simplificar

2 cos^{3} (x) - cos (x) - 2 cos (x) + 2 cos^{3} (x) : 4 cos^{3} (x) - 3 cos (x)

2 cos^{3} (x) - cos (x) - 2 cos (x) + 2 cos^{3} (x)

Agrupar términos semejantes

= 2 cos^{3} (x) + 2 cos^{3} (x) - cos (x) - 2 cos (x)

Sumar elementos similares:

2 cos^{3} (x) + 2 cos^{3} (x) = 4 cos^{3} (x)

= 4 cos^{3} (x) - cos (x) - 2 cos (x)

Sumar elementos similares:

- cos (x) - 2 cos (x) = - 3 cos (x)

= 4 cos^{3} (x) - 3 cos (x)

= 4 cos^{3} (x) - 3 cos (x)

= 4 cos^{3} (x) - 3 cos (x)

= - 1 + (4 cos^{3} (x) - 3 cos (x))^{2} + cos^{2} (x)

Simplificar

- 1 + (4 cos^{3} (x) - 3 cos (x))^{2} + cos^{2} (x) : - 1 + 16 cos^{6} (x) - 24 cos^{4} (x) + 10 cos^{2} (x)

- 1 + (4 cos^{3} (x) - 3 cos (x))^{2} + cos^{2} (x)

(4 cos^{3} (x) - 3 cos (x))^{2} : 16 cos^{6} (x) - 24 cos^{4} (x) + 9 cos^{2} (x)

Aplicar la formula del binomio al cuadrado:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

a = 4 cos^{3} (x), b = 3 cos (x)

= (4 cos^{3} (x))^{2} - 2 \cdot 4 cos^{3} (x) \cdot 3 cos (x) + (3 cos (x))^{2}

Simplificar

(4 cos^{3} (x))^{2} - 2 \cdot 4 cos^{3} (x) \cdot 3 cos (x) + (3 cos (x))^{2} : 16 cos^{6} (x) - 24 cos^{4} (x) + 9 cos^{2} (x)

(4 cos^{3} (x))^{2} - 2 \cdot 4 cos^{3} (x) \cdot 3 cos (x) + (3 cos (x))^{2}

(4 cos^{3} (x))^{2} = 16 cos^{6} (x)

(4 cos^{3} (x))^{2}

Aplicar las leyes de los exponentes:

(a \cdot b)^{n} = a^{n} b^{n}

= 4^{2} (cos^{3} (x))^{2}

(cos^{3} (x))^{2} : cos^{6} (x)

Aplicar las leyes de los exponentes:

(a^{b})^{c} = a^{b c}

= cos^{3 \cdot 2} (x)

Multiplicar los numeros:

3 \cdot 2 = 6

= cos^{6} (x)

= 4^{2} cos^{6} (x)

4^{2} = 16

= 16 cos^{6} (x)

2 \cdot 4 cos^{3} (x) \cdot 3 cos (x) = 24 cos^{4} (x)

2 \cdot 4 cos^{3} (x) \cdot 3 cos (x)

Multiplicar los numeros:

2 \cdot 4 \cdot 3 = 24

= 24 cos^{3} (x) cos (x)

Aplicar las leyes de los exponentes:

a^{b} \cdot a^{c} = a^{b + c}

cos^{3} (x) cos (x) = cos^{3 + 1} (x)

= 24 cos^{3 + 1} (x)

Sumar:

3 + 1 = 4

= 24 cos^{4} (x)

(3 cos (x))^{2} = 9 cos^{2} (x)

(3 cos (x))^{2}

Aplicar las leyes de los exponentes:

(a \cdot b)^{n} = a^{n} b^{n}

= 3^{2} cos^{2} (x)

3^{2} = 9

= 9 cos^{2} (x)

= 16 cos^{6} (x) - 24 cos^{4} (x) + 9 cos^{2} (x)

= 16 cos^{6} (x) - 24 cos^{4} (x) + 9 cos^{2} (x)

= - 1 + 16 cos^{6} (x) - 24 cos^{4} (x) + 9 cos^{2} (x) + cos^{2} (x)

Sumar elementos similares:

9 cos^{2} (x) + cos^{2} (x) = 10 cos^{2} (x)

= - 1 + 16 cos^{6} (x) - 24 cos^{4} (x) + 10 cos^{2} (x)

= - 1 + 16 cos^{6} (x) - 24 cos^{4} (x) + 10 cos^{2} (x)

- 1 + 10 cos^{2} (x) + 16 cos^{6} (x) - 24 cos^{4} (x) = 0

Usando el método de sustitución

- 1 + 10 cos^{2} (x) + 16 cos^{6} (x) - 24 cos^{4} (x) = 0

Sea:

cos (x) = u

- 1 + 10 u^{2} + 16 u^{6} - 24 u^{4} = 0

- 1 + 10 u^{2} + 16 u^{6} - 24 u^{4} = 0 : u = \frac{1}{2}, u = - \frac{1}{2}, u = \frac{2 + 2}{2}, u = - \frac{2 + 2}{2}, u = \frac{2 - 2}{2}, u = - \frac{2 - 2}{2}

- 1 + 10 u^{2} + 16 u^{6} - 24 u^{4} = 0

Escribir en la forma binómica

a_{n} x^{n} + \dots + a_{1} x + a_{0} = 0

16 u^{6} - 24 u^{4} + 10 u^{2} - 1 = 0

Re-escribir la ecuación con

v = u^{2}, v^{2} = u^{4}

v^{3} = u^{6}

16 v^{3} - 24 v^{2} + 10 v - 1 = 0

Resolver

16 v^{3} - 24 v^{2} + 10 v - 1 = 0 : v = \frac{1}{2}, v = \frac{2 + 2}{4}, v = \frac{2 - 2}{4}

16 v^{3} - 24 v^{2} + 10 v - 1 = 0

Factorizar

16 v^{3} - 24 v^{2} + 10 v - 1 : (2 v - 1) (8 v^{2} - 8 v + 1)

16 v^{3} - 24 v^{2} + 10 v - 1

Utilizar el teorema de la raíz racional

a_{0} = 1, a_{n} = 16

Los divisores de

a_{0} : 1,

Los divisores de

a_{n} : 1, 2, 4, 8, 16

Por lo tanto, verificar los siguientes numeros racionales:

\pm \frac{1}{1 , 2 , 4 , 8 , 16}

\frac{1}{2}

es la raíz de la expresión, por lo tanto, factorizar

2 v - 1

= (2 v - 1) \frac{16 v ^{3} - 24 v ^{2} + 10 v - 1}{2 v - 1}

\frac{16 v ^{3} - 24 v ^{2} + 10 v - 1}{2 v - 1} = 8 v^{2} - 8 v + 1

\frac{16 v ^{3} - 24 v ^{2} + 10 v - 1}{2 v - 1}

Dividir

\frac{16 v ^{3} - 24 v ^{2} + 10 v - 1}{2 v - 1} : \frac{16 v ^{3} - 24 v ^{2} + 10 v - 1}{2 v - 1} = 8 v^{2} + \frac{- 16 v ^{2} + 10 v - 1}{2 v - 1}

Dividir los coeficientes de los términos de mayor grado del numerador

16 v^{3} - 24 v^{2} + 10 v - 1

y el divisor

2 v - 1 : \frac{16 v ^{3}}{2 v} = 8 v^{2}

Cociente = 8 v^{2}

Multiplicar

2 v - 1

por

8 v^{2} : 16 v^{3} - 8 v^{2}

Substraer

16 v^{3} - 8 v^{2}

16 v^{3} - 24 v^{2} + 10 v - 1

para obtener un nuevo residuo

Residuo = - 16 v^{2} + 10 v - 1

Por lo tanto

\frac{16 v ^{3} - 24 v ^{2} + 10 v - 1}{2 v - 1} = 8 v^{2} + \frac{- 16 v ^{2} + 10 v - 1}{2 v - 1}

= 8 v^{2} + \frac{- 16 v ^{2} + 10 v - 1}{2 v - 1}

Dividir

\frac{- 16 v ^{2} + 10 v - 1}{2 v - 1} : \frac{- 16 v ^{2} + 10 v - 1}{2 v - 1} = - 8 v + \frac{2 v - 1}{2 v - 1}

Dividir los coeficientes de los términos de mayor grado del numerador

- 16 v^{2} + 10 v - 1

y el divisor

2 v - 1 : \frac{- 16 v ^{2}}{2 v} = - 8 v

Cociente = - 8 v

Multiplicar

2 v - 1

por

- 8 v : - 16 v^{2} + 8 v

Substraer

- 16 v^{2} + 8 v

- 16 v^{2} + 10 v - 1

para obtener un nuevo residuo

Residuo = 2 v - 1

Por lo tanto

\frac{- 16 v ^{2} + 10 v - 1}{2 v - 1} = - 8 v + \frac{2 v - 1}{2 v - 1}

= 8 v^{2} - 8 v + \frac{2 v - 1}{2 v - 1}

Dividir

\frac{2 v - 1}{2 v - 1} : \frac{2 v - 1}{2 v - 1} = 1

Dividir los coeficientes de los términos de mayor grado del numerador

2 v - 1

y el divisor

2 v - 1 : \frac{2 v}{2 v} = 1

Cociente = 1

Multiplicar

2 v - 1

por

1 : 2 v - 1

Substraer

2 v - 1

2 v - 1

para obtener un nuevo residuo

Residuo = 0

Por lo tanto

\frac{2 v - 1}{2 v - 1} = 1

= 8 v^{2} - 8 v + 1

= (2 v - 1) (8 v^{2} - 8 v + 1)

(2 v - 1) (8 v^{2} - 8 v + 1) = 0

Utilizando el teorema de factor cero: si

ab = 0

entonces

a = 0

b = 0

2 v - 1 = 0 or 8 v^{2} - 8 v + 1 = 0

Resolver

2 v - 1 = 0 : v = \frac{1}{2}

2 v - 1 = 0

Mover

1

al lado derecho

2 v - 1 = 0

Sumar

1

a ambos lados

2 v - 1 + 1 = 0 + 1

Simplificar

2 v = 1

2 v = 1

Dividir ambos lados entre

2

2 v = 1

Dividir ambos lados entre

2

\frac{2 v}{2} = \frac{1}{2}

Simplificar

v = \frac{1}{2}

v = \frac{1}{2}

Resolver

8 v^{2} - 8 v + 1 = 0 : v = \frac{2 + 2}{4}, v = \frac{2 - 2}{4}

8 v^{2} - 8 v + 1 = 0

Resolver con la fórmula general para ecuaciones de segundo grado:

8 v^{2} - 8 v + 1 = 0

Formula general para ecuaciones de segundo grado:

Para

a = 8, b = - 8, c = 1

v_{1, 2} = \frac{- ( - 8 ) \pm ( - 8 ) ^{2} - 4 \cdot 8 \cdot 1}{2 \cdot 8}

v_{1, 2} = \frac{- ( - 8 ) \pm ( - 8 ) ^{2} - 4 \cdot 8 \cdot 1}{2 \cdot 8}

(- 8)^{2} - 4 \cdot 8 \cdot 1 = 42

(- 8)^{2} - 4 \cdot 8 \cdot 1

Aplicar las leyes de los exponentes:

(- a)^{n} = a^{n},

n

es par

(- 8)^{2} = 8^{2}

= 8^{2} - 4 \cdot 8 \cdot 1

Multiplicar los numeros:

4 \cdot 8 \cdot 1 = 32

= 8^{2} - 32

8^{2} = 64

= 64 - 32

Restar:

64 - 32 = 32

= 32

Descomposición en factores primos de

32 : 2^{5}

32

32

divida por

232 = 16 \cdot 2

= 2 \cdot 16

16

divida por

216 = 8 \cdot 2

= 2 \cdot 2 \cdot 8

8

divida por

28 = 4 \cdot 2

= 2 \cdot 2 \cdot 2 \cdot 4

4

divida por

24 = 2 \cdot 2

= 2 \cdot 2 \cdot 2 \cdot 2 \cdot 2

2

es un número primo, por lo tanto, no es posible factorizar mas

= 2 \cdot 2 \cdot 2 \cdot 2 \cdot 2

= 2^{5}

= 2^{5}

Aplicar las leyes de los exponentes:

a^{b + c} = a^{b} \cdot a^{c}

= 2^{4} \cdot 2

Aplicar las leyes de los exponentes:

= 2 2^{4}

Aplicar las leyes de los exponentes:

2^{4} = 2^{\frac{4}{2}} = 2^{2}

= 2^{2} 2

Simplificar

= 42

v_{1, 2} = \frac{- ( - 8 ) \pm 4 2}{2 \cdot 8}

Separar las soluciones

v_{1} = \frac{- ( - 8 ) + 4 2}{2 \cdot 8}, v_{2} = \frac{- ( - 8 ) - 4 2}{2 \cdot 8}

v = \frac{- ( - 8 ) + 4 2}{2 \cdot 8} : \frac{2 + 2}{4}

\frac{- ( - 8 ) + 4 2}{2 \cdot 8}

Aplicar la regla

- (- a) = a

= \frac{8 + 4 2}{2 \cdot 8}

Multiplicar los numeros:

2 \cdot 8 = 16

= \frac{8 + 4 2}{16}

Factorizar

8 + 42 : 4 (2 + 2)

8 + 42

Reescribir como

= 4 \cdot 2 + 42

Factorizar el termino común

4

= 4 (2 + 2)

= \frac{4 ( 2 + 2 )}{16}

Eliminar los terminos comunes:

4

= \frac{2 + 2}{4}

v = \frac{- ( - 8 ) - 4 2}{2 \cdot 8} : \frac{2 - 2}{4}

\frac{- ( - 8 ) - 4 2}{2 \cdot 8}

Aplicar la regla

- (- a) = a

= \frac{8 - 4 2}{2 \cdot 8}

Multiplicar los numeros:

2 \cdot 8 = 16

= \frac{8 - 4 2}{16}

Factorizar

8 - 42 : 4 (2 - 2)

8 - 42

Reescribir como

= 4 \cdot 2 - 42

Factorizar el termino común

4

= 4 (2 - 2)

= \frac{4 ( 2 - 2 )}{16}

Eliminar los terminos comunes:

4

= \frac{2 - 2}{4}

Las soluciones a la ecuación de segundo grado son:

v = \frac{2 + 2}{4}, v = \frac{2 - 2}{4}

Las soluciones son

v = \frac{1}{2}, v = \frac{2 + 2}{4}, v = \frac{2 - 2}{4}

v = \frac{1}{2}, v = \frac{2 + 2}{4}, v = \frac{2 - 2}{4}

Sustituir hacia atrás la

v = u^{2},

resolver para

u

Resolver

u^{2} = \frac{1}{2} : u = \frac{1}{2}, u = - \frac{1}{2}

u^{2} = \frac{1}{2}

Para

x^{2} = f (a)

las soluciones son

x = f (a), - f (a)

u = \frac{1}{2}, u = - \frac{1}{2}

Resolver

u^{2} = \frac{2 + 2}{4} : u = \frac{2 + 2}{2}, u = - \frac{2 + 2}{2}

u^{2} = \frac{2 + 2}{4}

Para

x^{2} = f (a)

las soluciones son

x = f (a), - f (a)

u = \frac{2 + 2}{4}, u = - \frac{2 + 2}{4}

\frac{2 + 2}{4} = \frac{2 + 2}{2}

\frac{2 + 2}{4}

Aplicar la siguiente propiedad de los radicales:

asumiendo que

a \geq 0, b \geq 0

= \frac{2 + 2}{4}

4 = 2

4

Descomponer el número en factores primos:

4 = 2^{2}

= 2^{2}

Aplicar las leyes de los exponentes:

2^{2} = 2

= 2

= \frac{2 + 2}{2}

- \frac{2 + 2}{4} = - \frac{2 + 2}{2}

- \frac{2 + 2}{4}

Simplificar

\frac{2 + 2}{4} : \frac{2 + 2}{2}

\frac{2 + 2}{4}

Aplicar la siguiente propiedad de los radicales:

asumiendo que

a \geq 0, b \geq 0

= \frac{2 + 2}{4}

4 = 2

4

Descomponer el número en factores primos:

4 = 2^{2}

= 2^{2}

Aplicar las leyes de los exponentes:

2^{2} = 2

= 2

= \frac{2 + 2}{2}

= - \frac{2 + 2}{2}

u = \frac{2 + 2}{2}, u = - \frac{2 + 2}{2}

Resolver

u^{2} = \frac{2 - 2}{4} : u = \frac{2 - 2}{2}, u = - \frac{2 - 2}{2}

u^{2} = \frac{2 - 2}{4}

Para

x^{2} = f (a)

las soluciones son

x = f (a), - f (a)

u = \frac{2 - 2}{4}, u = - \frac{2 - 2}{4}

\frac{2 - 2}{4} = \frac{2 - 2}{2}

\frac{2 - 2}{4}

Aplicar la siguiente propiedad de los radicales:

asumiendo que

a \geq 0, b \geq 0

= \frac{2 - 2}{4}

4 = 2

4

Descomponer el número en factores primos:

4 = 2^{2}

= 2^{2}

Aplicar las leyes de los exponentes:

2^{2} = 2

= 2

= \frac{2 - 2}{2}

- \frac{2 - 2}{4} = - \frac{2 - 2}{2}

- \frac{2 - 2}{4}

Simplificar

\frac{2 - 2}{4} : \frac{2 - 2}{2}

\frac{2 - 2}{4}

Aplicar la siguiente propiedad de los radicales:

asumiendo que

a \geq 0, b \geq 0

= \frac{2 - 2}{4}

4 = 2

4

Descomponer el número en factores primos:

4 = 2^{2}

= 2^{2}

Aplicar las leyes de los exponentes:

2^{2} = 2

= 2

= \frac{2 - 2}{2}

= - \frac{2 - 2}{2}

u = \frac{2 - 2}{2}, u = - \frac{2 - 2}{2}

Las soluciones son

u = \frac{1}{2}, u = - \frac{1}{2}, u = \frac{2 + 2}{2}, u = - \frac{2 + 2}{2}, u = \frac{2 - 2}{2}, u = - \frac{2 - 2}{2}

Sustituir en la ecuación

u = cos (x)

cos (x) = \frac{1}{2}, cos (x) = - \frac{1}{2}, cos (x) = \frac{2 + 2}{2}, cos (x) = - \frac{2 + 2}{2}, cos (x) = \frac{2 - 2}{2}, cos (x) = - \frac{2 - 2}{2}

cos (x) = \frac{1}{2}, cos (x) = - \frac{1}{2}, cos (x) = \frac{2 + 2}{2}, cos (x) = - \frac{2 + 2}{2}, cos (x) = \frac{2 - 2}{2}, cos (x) = - \frac{2 - 2}{2}

cos (x) = \frac{1}{2} : x = arccos (\frac{1}{2}) + 2 πn, x = 2 π - arccos (\frac{1}{2}) + 2 πn

cos (x) = \frac{1}{2}

Aplicar propiedades trigonométricas inversas

cos (x) = \frac{1}{2}

Soluciones generales para

cos (x) = \frac{1}{2}

cos (x) = a \Rightarrow x = arccos (a) + 2 πn, x = 2 π - arccos (a) + 2 πn

x = arccos (\frac{1}{2}) + 2 πn, x = 2 π - arccos (\frac{1}{2}) + 2 πn

x = arccos (\frac{1}{2}) + 2 πn, x = 2 π - arccos (\frac{1}{2}) + 2 πn

cos (x) = - \frac{1}{2} : x = arccos (- \frac{1}{2}) + 2 πn, x = - arccos (- \frac{1}{2}) + 2 πn

cos (x) = - \frac{1}{2}

Aplicar propiedades trigonométricas inversas

cos (x) = - \frac{1}{2}

Soluciones generales para

cos (x) = - \frac{1}{2}

cos (x) = - a \Rightarrow x = arccos (- a) + 2 πn, x = - arccos (- a) + 2 πn

x = arccos (- \frac{1}{2}) + 2 πn, x = - arccos (- \frac{1}{2}) + 2 πn

x = arccos (- \frac{1}{2}) + 2 πn, x = - arccos (- \frac{1}{2}) + 2 πn

cos (x) = \frac{2 + 2}{2} : x = arccos (\frac{2 + 2}{2}) + 2 πn, x = 2 π - arccos (\frac{2 + 2}{2}) + 2 πn

cos (x) = \frac{2 + 2}{2}

Aplicar propiedades trigonométricas inversas

cos (x) = \frac{2 + 2}{2}

Soluciones generales para

cos (x) = \frac{2 + 2}{2}

cos (x) = a \Rightarrow x = arccos (a) + 2 πn, x = 2 π - arccos (a) + 2 πn

x = arccos (\frac{2 + 2}{2}) + 2 πn, x = 2 π - arccos (\frac{2 + 2}{2}) + 2 πn

x = arccos (\frac{2 + 2}{2}) + 2 πn, x = 2 π - arccos (\frac{2 + 2}{2}) + 2 πn

cos (x) = - \frac{2 + 2}{2} : x = arccos (- \frac{2 + 2}{2}) + 2 πn, x = - arccos (- \frac{2 + 2}{2}) + 2 πn

cos (x) = - \frac{2 + 2}{2}

Aplicar propiedades trigonométricas inversas

cos (x) = - \frac{2 + 2}{2}

Soluciones generales para

cos (x) = - \frac{2 + 2}{2}

cos (x) = - a \Rightarrow x = arccos (- a) + 2 πn, x = - arccos (- a) + 2 πn

x = arccos (- \frac{2 + 2}{2}) + 2 πn, x = - arccos (- \frac{2 + 2}{2}) + 2 πn

x = arccos (- \frac{2 + 2}{2}) + 2 πn, x = - arccos (- \frac{2 + 2}{2}) + 2 πn

cos (x) = \frac{2 - 2}{2} : x = arccos (\frac{2 - 2}{2}) + 2 πn, x = 2 π - arccos (\frac{2 - 2}{2}) + 2 πn

cos (x) = \frac{2 - 2}{2}

Aplicar propiedades trigonométricas inversas

cos (x) = \frac{2 - 2}{2}

Soluciones generales para

cos (x) = \frac{2 - 2}{2}

cos (x) = a \Rightarrow x = arccos (a) + 2 πn, x = 2 π - arccos (a) + 2 πn

x = arccos (\frac{2 - 2}{2}) + 2 πn, x = 2 π - arccos (\frac{2 - 2}{2}) + 2 πn

x = arccos (\frac{2 - 2}{2}) + 2 πn, x = 2 π - arccos (\frac{2 - 2}{2}) + 2 πn

cos (x) = - \frac{2 - 2}{2} : x = arccos (- \frac{2 - 2}{2}) + 2 πn, x = - arccos (- \frac{2 - 2}{2}) + 2 πn

cos (x) = - \frac{2 - 2}{2}

Aplicar propiedades trigonométricas inversas

cos (x) = - \frac{2 - 2}{2}

Soluciones generales para

cos (x) = - \frac{2 - 2}{2}

cos (x) = - a \Rightarrow x = arccos (- a) + 2 πn, x = - arccos (- a) + 2 πn

x = arccos (- \frac{2 - 2}{2}) + 2 πn, x = - arccos (- \frac{2 - 2}{2}) + 2 πn

x = arccos (- \frac{2 - 2}{2}) + 2 πn, x = - arccos (- \frac{2 - 2}{2}) + 2 πn

Combinar toda las soluciones

x = arccos (\frac{1}{2}) + 2 πn, x = 2 π - arccos (\frac{1}{2}) + 2 πn, x = arccos (- \frac{1}{2}) + 2 πn, x = - arccos (- \frac{1}{2}) + 2 πn, x = arccos (\frac{2 + 2}{2}) + 2 πn, x = 2 π - arccos (\frac{2 + 2}{2}) + 2 πn, x = arccos (- \frac{2 + 2}{2}) + 2 πn, x = - arccos (- \frac{2 + 2}{2}) + 2 πn, x = arccos (\frac{2 - 2}{2}) + 2 πn, x = 2 π - arccos (\frac{2 - 2}{2}) + 2 πn, x = arccos (- \frac{2 - 2}{2}) + 2 πn, x = - arccos (- \frac{2 - 2}{2}) + 2 πn

Mostrar soluciones en forma decimal

x = 0.78539 \dots + 2 πn, x = 2 π - 0.78539 \dots + 2 πn, x = 2.35619 \dots + 2 πn, x = - 2.35619 \dots + 2 πn, x = 0.39269 \dots + 2 πn, x = 2 π - 0.39269 \dots + 2 πn, x = 2.74889 \dots + 2 πn, x = - 2.74889 \dots + 2 πn, x = 1.17809 \dots + 2 πn, x = 2 π - 1.17809 \dots + 2 πn, x = 1.96349 \dots + 2 πn, x = - 1.96349 \dots + 2 πn

Ejemplos populares

tan(x)= 16/3

tan (x) = \frac{16}{3}

1/((sec(a)-tan(a)))=sec(a)+tan(x)

\frac{1}{( sec ( a ) - tan ( a ) )} = sec (a) + tan (x)

-2=tan^2(x)

- 2 = tan^{2} (x)

3sin^2(x)-1=cos^4(x)

3 sin^{2} (x) - 1 = cos^{4} (x)

sin(3*x)=cos(x)

sin (3 \cdot x) = cos (x)