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Popular Trigonometria >

8|sin(pix)-0.25|+1=7

Solução

8 ∣ sin (π x) - 0.25 ∣ + 1 = 7

Solução

x = \frac{7}{6} + 2 n, x = \frac{11}{6} + 2 n, x = \frac{1}{2} + 2 n

Graus

x = 66.84507 \dots^{\circ} + 114.59155 \dots^{\circ} n, x = 105.04226 \dots^{\circ} + 114.59155 \dots^{\circ} n, x = 28.64788 \dots^{\circ} + 114.59155 \dots^{\circ} n

Passos da solução

8 ∣ sin (π x) - 0.25 ∣ + 1 = 7

Usando o método de substituição

8 ∣ sin (π x) - 0.25 ∣ + 1 = 7

Sea:

sin (π x) = u

8 ∣ u - 0.25 ∣ + 1 = 7

8 ∣ u - 0.25 ∣ + 1 = 7 : u = - 0.5 or u = 1

8 ∣ u - 0.25 ∣ + 1 = 7

Mova

1

para o lado direito

8 ∣ u - 0.25 ∣ + 1 = 7

Subtrair

1

de ambos os lados

8 ∣ u - 0.25 ∣ + 1 - 1 = 7 - 1

Simplificar

8 ∣ u - 0.25 ∣ = 6

8 ∣ u - 0.25 ∣ = 6

Dividir ambos os lados por

8

8 ∣ u - 0.25 ∣ = 6

Dividir ambos os lados por

8

\frac{8 ∣ u - 0.25 ∣}{8} = \frac{6}{8}

Simplificar

∣ u - 0.25 ∣ = \frac{3}{4}

∣ u - 0.25 ∣ = \frac{3}{4}

Aplicar as propriedades dos valores absolutos: Se

∣ u ∣ = a, a > 0

então

u = a

u = - a

u - 0.25 = - \frac{3}{4} or u - 0.25 = \frac{3}{4}

u - 0.25 = - \frac{3}{4} or u - 0.25 = \frac{3}{4}

u - 0.25 = - \frac{3}{4} or u - 0.25 = \frac{3}{4}

u - 0.25 = - \frac{3}{4} : u = - 0.5

u - 0.25 = - \frac{3}{4}

Mova

0.25

para o lado direito

u - 0.25 = - \frac{3}{4}

Adicionar

0.25

a ambos os lados

u - 0.25 + 0.25 = - \frac{3}{4} + 0.25

Simplificar

u - 0.25 + 0.25 = - \frac{3}{4} + 0.25

Simplificar

u - 0.25 + 0.25 : u

u - 0.25 + 0.25

Somar elementos similares:

- 0.25 + 0.25 = 0

= u

Simplificar

- \frac{3}{4} + 0.25 : - 0.5

- \frac{3}{4} + 0.25

Converter o elemento em uma forma decimal

\frac{3}{4} = 0.75

= - 0.75 + 0.25

Somar/subtrair:

- 0.75 + 0.25 = - 0.5

= - 0.5

u = - 0.5

u = - 0.5

u = - 0.5

u - 0.25 = \frac{3}{4} : u = 1

u - 0.25 = \frac{3}{4}

Mova

0.25

para o lado direito

u - 0.25 = \frac{3}{4}

Adicionar

0.25

a ambos os lados

u - 0.25 + 0.25 = \frac{3}{4} + 0.25

Simplificar

u - 0.25 + 0.25 = \frac{3}{4} + 0.25

Simplificar

u - 0.25 + 0.25 : u

u - 0.25 + 0.25

Somar elementos similares:

- 0.25 + 0.25 = 0

= u

Simplificar

\frac{3}{4} + 0.25 : 1

\frac{3}{4} + 0.25

Converter o elemento em uma forma decimal

\frac{3}{4} = 0.75

= 0.75 + 0.25

Somar:

0.75 + 0.25 = 1

= 1

u = 1

u = 1

u = 1

Combine soluções:

u = - 0.5 or u = 1

u = - 0.5 or u = 1

Substituir na equação

u = sin (π x)

sin (π x) = - 0.5 or sin (π x) = 1

sin (π x) = - 0.5 or sin (π x) = 1

sin (π x) = - 0.5 : x = \frac{7}{6} + 2 n, x = \frac{11}{6} + 2 n

sin (π x) = - 0.5

Soluções gerais para

sin (π x) = - 0.5

sin (x)

tabela de periodicidade com ciclo de

2 πn

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

π x = \frac{7 π}{6} + 2 πn, π x = \frac{11 π}{6} + 2 πn

π x = \frac{7 π}{6} + 2 πn, π x = \frac{11 π}{6} + 2 πn

Resolver

π x = \frac{7 π}{6} + 2 πn : x = \frac{7}{6} + 2 n

π x = \frac{7 π}{6} + 2 πn

Dividir ambos os lados por

π

π x = \frac{7 π}{6} + 2 πn

Dividir ambos os lados por

π

\frac{π x}{π} = \frac{\frac{7 π}{6}}{π} + \frac{2 πn}{π}

Simplificar

\frac{π x}{π} = \frac{\frac{7 π}{6}}{π} + \frac{2 πn}{π}

Simplificar

\frac{π x}{π} : x

\frac{π x}{π}

Eliminar o fator comum:

π

= x

Simplificar

\frac{\frac{7 π}{6}}{π} + \frac{2 πn}{π} : \frac{7}{6} + 2 n

\frac{\frac{7 π}{6}}{π} + \frac{2 πn}{π}

\frac{\frac{7 π}{6}}{π} = \frac{7}{6}

\frac{\frac{7 π}{6}}{π}

Aplicar as propriedades das frações:

\frac{\frac{b}{c}}{a} = \frac{b}{c \cdot a}

= \frac{7 π}{6 π}

Eliminar o fator comum:

π

= \frac{7}{6}

\frac{2 πn}{π} = 2 n

\frac{2 πn}{π}

Eliminar o fator comum:

π

= 2 n

= \frac{7}{6} + 2 n

x = \frac{7}{6} + 2 n

x = \frac{7}{6} + 2 n

x = \frac{7}{6} + 2 n

Resolver

π x = \frac{11 π}{6} + 2 πn : x = \frac{11}{6} + 2 n

π x = \frac{11 π}{6} + 2 πn

Dividir ambos os lados por

π

π x = \frac{11 π}{6} + 2 πn

Dividir ambos os lados por

π

\frac{π x}{π} = \frac{\frac{11 π}{6}}{π} + \frac{2 πn}{π}

Simplificar

\frac{π x}{π} = \frac{\frac{11 π}{6}}{π} + \frac{2 πn}{π}

Simplificar

\frac{π x}{π} : x

\frac{π x}{π}

Eliminar o fator comum:

π

= x

Simplificar

\frac{\frac{11 π}{6}}{π} + \frac{2 πn}{π} : \frac{11}{6} + 2 n

\frac{\frac{11 π}{6}}{π} + \frac{2 πn}{π}

\frac{\frac{11 π}{6}}{π} = \frac{11}{6}

\frac{\frac{11 π}{6}}{π}

Aplicar as propriedades das frações:

\frac{\frac{b}{c}}{a} = \frac{b}{c \cdot a}

= \frac{11 π}{6 π}

Eliminar o fator comum:

π

= \frac{11}{6}

\frac{2 πn}{π} = 2 n

\frac{2 πn}{π}

Eliminar o fator comum:

π

= 2 n

= \frac{11}{6} + 2 n

x = \frac{11}{6} + 2 n

x = \frac{11}{6} + 2 n

x = \frac{11}{6} + 2 n

x = \frac{7}{6} + 2 n, x = \frac{11}{6} + 2 n

sin (π x) = 1 : x = \frac{1}{2} + 2 n

sin (π x) = 1

Soluções gerais para

sin (π x) = 1

sin (x)

tabela de periodicidade com ciclo de

2 πn

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

π x = \frac{π}{2} + 2 πn

π x = \frac{π}{2} + 2 πn

Resolver

π x = \frac{π}{2} + 2 πn : x = \frac{1}{2} + 2 n

π x = \frac{π}{2} + 2 πn

Dividir ambos os lados por

π

π x = \frac{π}{2} + 2 πn

Dividir ambos os lados por

π

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

Simplificar

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

Simplificar

\frac{π x}{π} : x

\frac{π x}{π}

Eliminar o fator comum:

π

= x

Simplificar

\frac{\frac{π}{2}}{π} + \frac{2 πn}{π} : \frac{1}{2} + 2 n

\frac{\frac{π}{2}}{π} + \frac{2 πn}{π}

\frac{\frac{π}{2}}{π} = \frac{1}{2}

\frac{\frac{π}{2}}{π}

Aplicar as propriedades das frações:

\frac{\frac{b}{c}}{a} = \frac{b}{c \cdot a}

= \frac{π}{2 π}

Eliminar o fator comum:

π

= \frac{1}{2}

\frac{2 πn}{π} = 2 n

\frac{2 πn}{π}

Eliminar o fator comum:

π

= 2 n

= \frac{1}{2} + 2 n

x = \frac{1}{2} + 2 n

x = \frac{1}{2} + 2 n

x = \frac{1}{2} + 2 n

x = \frac{1}{2} + 2 n

Combinar toda as soluções

x = \frac{7}{6} + 2 n, x = \frac{11}{6} + 2 n, x = \frac{1}{2} + 2 n

Gráfico

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