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Popular >

sin(x)=tan(x/2)

Solución

sin (x) = tan (\frac{x}{2})

Solución

x = 4 πn, x = 2 π + 4 πn, x = \frac{3 π}{2} + 4 πn, x = \frac{5 π}{2} + 4 πn, x = \frac{π}{2} + 4 πn, x = \frac{7 π}{2} + 4 πn

+1

Pasos de solución

sin (x) = tan (\frac{x}{2})

Restar

tan (\frac{x}{2})

de ambos lados

sin (x) - tan (\frac{x}{2}) = 0

Sea:

u = \frac{x}{2}

sin (2 u) - tan (u) = 0

Expresar con seno, coseno

\frac{- sin ( u ) + cos ( u ) sin ( 2 u )}{cos ( u )} = 0

\frac{f ( x )}{g ( x )} = 0 \Rightarrow f (x) = 0

- sin (u) + cos (u) sin (2 u) = 0

Re-escribir usando identidades trigonométricas

- sin (u) + 2 cos^{2} (u) sin (u) = 0

Factorizar

- sin (u) + 2 cos^{2} (u) sin (u) : sin (u) (2 cos (u) + 1) (2 cos (u) - 1)

sin (u) (2 cos (u) + 1) (2 cos (u) - 1) = 0

Resolver cada parte por separado

sin (u) = 0 or 2 cos (u) + 1 = 0 or 2 cos (u) - 1 = 0

sin (u) = 0 : u = 2 πn, u = π + 2 πn

2 cos (u) + 1 = 0 : u = \frac{3 π}{4} + 2 πn, u = \frac{5 π}{4} + 2 πn

2 cos (u) - 1 = 0 : u = \frac{π}{4} + 2 πn, u = \frac{7 π}{4} + 2 πn

Combinar toda las soluciones

u = 2 πn, u = π + 2 πn, u = \frac{3 π}{4} + 2 πn, u = \frac{5 π}{4} + 2 πn, u = \frac{π}{4} + 2 πn, u = \frac{7 π}{4} + 2 πn

Sustituir en la ecuación

u = \frac{x}{2}

\frac{x}{2} = 2 πn : x = 4 πn

\frac{x}{2} = π + 2 πn : x = 2 π + 4 πn

\frac{x}{2} = \frac{3 π}{4} + 2 πn : x = \frac{3 π}{2} + 4 πn

\frac{x}{2} = \frac{5 π}{4} + 2 πn : x = \frac{5 π}{2} + 4 πn

\frac{x}{2} = \frac{π}{4} + 2 πn : x = \frac{π}{2} + 4 πn

\frac{x}{2} = \frac{7 π}{4} + 2 πn : x = \frac{7 π}{2} + 4 πn

x = 4 πn, x = 2 π + 4 πn, x = \frac{3 π}{2} + 4 πn, x = \frac{5 π}{2} + 4 πn, x = \frac{π}{2} + 4 πn, x = \frac{7 π}{2} + 4 πn

Ejemplos populares

2sin^2(x)-17sin(x)+8=0

2 sin^{2} (x) - 17 sin (x) + 8 = 0

4cos^2(t)sin(t)-2cos(t)sin(t)=0

4 cos^{2} (t) sin (t) - 2 cos (t) sin (t) = 0

3(1-sin(θ))=2cos^2(θ)

3 (1 - sin (θ)) = 2 cos^{2} (θ)

sin(x)=(sqrt(5))/5

sin (x) = \frac{5}{5}

tan(θ)=0.11246

tan (θ) = 0.11246