English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular Trigonometria >

sin(3x)=sin(6x)

Solução

sin (3 x) = sin (6 x)

Solução

x = \frac{π}{9} + \frac{4 πn}{9}, x = \frac{π}{3} + \frac{4 πn}{9}, x = \frac{4 πn}{3}, x = \frac{2 π}{3} + \frac{4 πn}{3}

Graus

x = 2 0^{\circ} + 8 0^{\circ} n, x = 6 0^{\circ} + 8 0^{\circ} n, x = 0^{\circ} + 24 0^{\circ} n, x = 12 0^{\circ} + 24 0^{\circ} n

Passos da solução

sin (3 x) = sin (6 x)

Subtrair

sin (6 x)

de ambos os lados

sin (3 x) - sin (6 x) = 0

Reeecreva usando identidades trigonométricas

sin (3 x) - sin (6 x)

Use a identidade da transformação de soma em produto:

sin (s) - sin (t) = 2 sin (\frac{s - t}{2}) cos (\frac{s + t}{2})

= 2 sin (\frac{3 x - 6 x}{2}) cos (\frac{3 x + 6 x}{2})

Simplificar

2 sin (\frac{3 x - 6 x}{2}) cos (\frac{3 x + 6 x}{2}) : - 2 cos (\frac{9 x}{2}) sin (\frac{3 x}{2})

2 sin (\frac{3 x - 6 x}{2}) cos (\frac{3 x + 6 x}{2})

\frac{3 x - 6 x}{2} = - \frac{3 x}{2}

\frac{3 x - 6 x}{2}

Somar elementos similares:

3 x - 6 x = - 3 x

= \frac{- 3 x}{2}

Aplicar as propriedades das frações:

\frac{- a}{b} = - \frac{a}{b}

= - \frac{3 x}{2}

= 2 sin (- \frac{3 x}{2}) cos (\frac{3 x + 6 x}{2})

Use a identidade de ângulo negativo:

sin (- x) = - sin (x)

= 2 cos (\frac{3 x + 6 x}{2}) (- sin (\frac{3 x}{2}))

Remover os parênteses:

(- a) = - a

= - 2 cos (\frac{3 x + 6 x}{2}) sin (\frac{3 x}{2})

Somar elementos similares:

3 x + 6 x = 9 x

= - 2 cos (\frac{9 x}{2}) sin (\frac{3 x}{2})

= - 2 cos (\frac{9 x}{2}) sin (\frac{3 x}{2})

- 2 cos (\frac{9 x}{2}) sin (\frac{3 x}{2}) = 0

Resolver cada parte separadamente

cos (\frac{9 x}{2}) = 0 or sin (\frac{3 x}{2}) = 0

cos (\frac{9 x}{2}) = 0 : x = \frac{π}{9} + \frac{4 πn}{9}, x = \frac{π}{3} + \frac{4 πn}{9}

cos (\frac{9 x}{2}) = 0

Soluções gerais para

cos (\frac{9 x}{2}) = 0

cos (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} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{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} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

\frac{9 x}{2} = \frac{π}{2} + 2 πn, \frac{9 x}{2} = \frac{3 π}{2} + 2 πn

\frac{9 x}{2} = \frac{π}{2} + 2 πn, \frac{9 x}{2} = \frac{3 π}{2} + 2 πn

Resolver

\frac{9 x}{2} = \frac{π}{2} + 2 πn : x = \frac{π}{9} + \frac{4 πn}{9}

\frac{9 x}{2} = \frac{π}{2} + 2 πn

Multiplicar ambos os lados por

2

\frac{9 x}{2} = \frac{π}{2} + 2 πn

Multiplicar ambos os lados por

2

\frac{2 \cdot 9 x}{2} = 2 \cdot \frac{π}{2} + 2 \cdot 2 πn

Simplificar

\frac{2 \cdot 9 x}{2} = 2 \cdot \frac{π}{2} + 2 \cdot 2 πn

Simplificar

\frac{2 \cdot 9 x}{2} : 9 x

\frac{2 \cdot 9 x}{2}

Multiplicar os números:

2 \cdot 9 = 18

= \frac{18 x}{2}

Dividir:

\frac{18}{2} = 9

= 9 x

Simplificar

2 \cdot \frac{π}{2} + 2 \cdot 2 πn : π + 4 πn

2 \cdot \frac{π}{2} + 2 \cdot 2 πn

2 \cdot \frac{π}{2} = π

2 \cdot \frac{π}{2}

Multiplicar frações:

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

= \frac{π 2}{2}

Eliminar o fator comum:

2

= π

2 \cdot 2 πn = 4 πn

2 \cdot 2 πn

Multiplicar os números:

2 \cdot 2 = 4

= 4 πn

= π + 4 πn

9 x = π + 4 πn

9 x = π + 4 πn

9 x = π + 4 πn

Dividir ambos os lados por

9

9 x = π + 4 πn

Dividir ambos os lados por

9

\frac{9 x}{9} = \frac{π}{9} + \frac{4 πn}{9}

Simplificar

x = \frac{π}{9} + \frac{4 πn}{9}

x = \frac{π}{9} + \frac{4 πn}{9}

Resolver

\frac{9 x}{2} = \frac{3 π}{2} + 2 πn : x = \frac{π}{3} + \frac{4 πn}{9}

\frac{9 x}{2} = \frac{3 π}{2} + 2 πn

Multiplicar ambos os lados por

2

\frac{9 x}{2} = \frac{3 π}{2} + 2 πn

Multiplicar ambos os lados por

2

\frac{2 \cdot 9 x}{2} = 2 \cdot \frac{3 π}{2} + 2 \cdot 2 πn

Simplificar

\frac{2 \cdot 9 x}{2} = 2 \cdot \frac{3 π}{2} + 2 \cdot 2 πn

Simplificar

\frac{2 \cdot 9 x}{2} : 9 x

\frac{2 \cdot 9 x}{2}

Multiplicar os números:

2 \cdot 9 = 18

= \frac{18 x}{2}

Dividir:

\frac{18}{2} = 9

= 9 x

Simplificar

2 \cdot \frac{3 π}{2} + 2 \cdot 2 πn : 3 π + 4 πn

2 \cdot \frac{3 π}{2} + 2 \cdot 2 πn

2 \cdot \frac{3 π}{2} = 3 π

2 \cdot \frac{3 π}{2}

Multiplicar frações:

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

= \frac{3 π 2}{2}

Eliminar o fator comum:

2

= 3 π

2 \cdot 2 πn = 4 πn

2 \cdot 2 πn

Multiplicar os números:

2 \cdot 2 = 4

= 4 πn

= 3 π + 4 πn

9 x = 3 π + 4 πn

9 x = 3 π + 4 πn

9 x = 3 π + 4 πn

Dividir ambos os lados por

9

9 x = 3 π + 4 πn

Dividir ambos os lados por

9

\frac{9 x}{9} = \frac{3 π}{9} + \frac{4 πn}{9}

Simplificar

x = \frac{π}{3} + \frac{4 πn}{9}

x = \frac{π}{3} + \frac{4 πn}{9}

x = \frac{π}{9} + \frac{4 πn}{9}, x = \frac{π}{3} + \frac{4 πn}{9}

sin (\frac{3 x}{2}) = 0 : x = \frac{4 πn}{3}, x = \frac{2 π}{3} + \frac{4 πn}{3}

sin (\frac{3 x}{2}) = 0

Soluções gerais para

sin (\frac{3 x}{2}) = 0

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}

\frac{3 x}{2} = 0 + 2 πn, \frac{3 x}{2} = π + 2 πn

\frac{3 x}{2} = 0 + 2 πn, \frac{3 x}{2} = π + 2 πn

Resolver

\frac{3 x}{2} = 0 + 2 πn : x = \frac{4 πn}{3}

\frac{3 x}{2} = 0 + 2 πn

0 + 2 πn = 2 πn

\frac{3 x}{2} = 2 πn

Multiplicar ambos os lados por

2

\frac{3 x}{2} = 2 πn

Multiplicar ambos os lados por

2

\frac{2 \cdot 3 x}{2} = 2 \cdot 2 πn

Simplificar

3 x = 4 πn

3 x = 4 πn

Dividir ambos os lados por

3

3 x = 4 πn

Dividir ambos os lados por

3

\frac{3 x}{3} = \frac{4 πn}{3}

Simplificar

x = \frac{4 πn}{3}

x = \frac{4 πn}{3}

Resolver

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

\frac{3 x}{2} = π + 2 πn

Multiplicar ambos os lados por

2

\frac{3 x}{2} = π + 2 πn

Multiplicar ambos os lados por

2

\frac{2 \cdot 3 x}{2} = 2 π + 2 \cdot 2 πn

Simplificar

3 x = 2 π + 4 πn

3 x = 2 π + 4 πn

Dividir ambos os lados por

3

3 x = 2 π + 4 πn

Dividir ambos os lados por

3

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

Simplificar

x = \frac{2 π}{3} + \frac{4 πn}{3}

x = \frac{2 π}{3} + \frac{4 πn}{3}

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

Combinar toda as soluções

x = \frac{π}{9} + \frac{4 πn}{9}, x = \frac{π}{3} + \frac{4 πn}{9}, x = \frac{4 πn}{3}, x = \frac{2 π}{3} + \frac{4 πn}{3}

Gráfico

Exemplos populares

tan^3(x)=0

tan^{3} (x) = 0

2cos^2(x)=11cos(x)+1

2 cos^{2} (x) = 11 cos (x) + 1

sin(x)sec(x)=2tan(x)-1

sin (x) sec (x) = 2 tan (x) - 1

sin(x)=sin(x+30)

sin (x) = sin (x + 3 0^{\circ})

cos^2(x)+7/12 cos(x)+1/12 =0

cos^{2} (x) + \frac{7}{12} cos (x) + \frac{1}{12} = 0