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Popular Trigonometria >

sin(x-30)=cos(15)

Solução

sin (x - 3 0^{\circ}) = cos (1 5^{\circ})

Solução

x = 1.30899 \dots + 36 0^{\circ} n + 3 0^{\circ}, x = 18 0^{\circ} - 1.30899 \dots + 36 0^{\circ} n + 3 0^{\circ}

Radianos

x = 1.30899 \dots + \frac{π}{6} + 2 πn, x = π - 1.30899 \dots + \frac{π}{6} + 2 πn

Passos da solução

sin (x - 3 0^{\circ}) = cos (1 5^{\circ})

cos (1 5^{\circ}) = \frac{6 + 2}{4}

cos (1 5^{\circ})

Reeecreva usando identidades trigonométricas:

cos (4 5^{\circ}) cos (3 0^{\circ}) + sin (4 5^{\circ}) sin (3 0^{\circ})

cos (1 5^{\circ})

Escrever

cos (1 5^{\circ})

como

cos (4 5^{\circ} - 3 0^{\circ})

= cos (4 5^{\circ} - 3 0^{\circ})

Use a identidade de diferença de ângulos:

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

= cos (4 5^{\circ}) cos (3 0^{\circ}) + sin (4 5^{\circ}) sin (3 0^{\circ})

= cos (4 5^{\circ}) cos (3 0^{\circ}) + sin (4 5^{\circ}) sin (3 0^{\circ})

Utilizar a seguinte identidade trivial:

cos (4 5^{\circ}) = \frac{2}{2}

cos (4 5^{\circ})

cos (x)

tabela de periodicidade com ciclo de

36 0^{\circ} n

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

= \frac{2}{2}

Utilizar a seguinte identidade trivial:

cos (3 0^{\circ}) = \frac{3}{2}

cos (3 0^{\circ})

cos (x)

tabela de periodicidade com ciclo de

36 0^{\circ} n

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

= \frac{3}{2}

Utilizar a seguinte identidade trivial:

sin (4 5^{\circ}) = \frac{2}{2}

sin (4 5^{\circ})

sin (x)

tabela de periodicidade com ciclo de

36 0^{\circ} n

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

= \frac{2}{2}

Utilizar a seguinte identidade trivial:

sin (3 0^{\circ}) = \frac{1}{2}

sin (3 0^{\circ})

sin (x)

tabela de periodicidade com ciclo de

36 0^{\circ} n

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

= \frac{1}{2}

= \frac{2}{2} \cdot \frac{3}{2} + \frac{2}{2} \cdot \frac{1}{2}

Simplificar

\frac{2}{2} \cdot \frac{3}{2} + \frac{2}{2} \cdot \frac{1}{2} : \frac{6 + 2}{4}

\frac{2}{2} \cdot \frac{3}{2} + \frac{2}{2} \cdot \frac{1}{2}

\frac{2}{2} \cdot \frac{3}{2} = \frac{6}{4}

\frac{2}{2} \cdot \frac{3}{2}

Multiplicar frações:

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

= \frac{2 3}{2 \cdot 2}

Multiplicar os números:

2 \cdot 2 = 4

= \frac{2 3}{4}

Simplificar

23 : 6

23

Aplicar as propriedades dos radicais:

a b = a \cdot b

23 = 2 \cdot 3

= 2 \cdot 3

Multiplicar os números:

2 \cdot 3 = 6

= 6

= \frac{6}{4}

\frac{2}{2} \cdot \frac{1}{2} = \frac{2}{4}

\frac{2}{2} \cdot \frac{1}{2}

Multiplicar frações:

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

= \frac{2 \cdot 1}{2 \cdot 2}

Multiplicar:

2 \cdot 1 = 2

= \frac{2}{2 \cdot 2}

Multiplicar os números:

2 \cdot 2 = 4

= \frac{2}{4}

= \frac{6}{4} + \frac{2}{4}

Aplicar a regra

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

= \frac{6 + 2}{4}

= \frac{6 + 2}{4}

sin (x - 3 0^{\circ}) = \frac{6 + 2}{4}

Aplique as propriedades trigonométricas inversas

sin (x - 3 0^{\circ}) = \frac{6 + 2}{4}

Soluções gerais para

sin (x - 3 0^{\circ}) = \frac{6 + 2}{4}

sin (x) = a \Rightarrow x = arcsin (a) + 36 0^{\circ} n, x = 18 0^{\circ} - arcsin (a) + 36 0^{\circ} n

x - 3 0^{\circ} = arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n, x - 3 0^{\circ} = 18 0^{\circ} - arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n

x - 3 0^{\circ} = arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n, x - 3 0^{\circ} = 18 0^{\circ} - arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n

Resolver

x - 3 0^{\circ} = arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n : x = arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n + 3 0^{\circ}

x - 3 0^{\circ} = arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n

Mova

3 0^{\circ}

para o lado direito

x - 3 0^{\circ} = arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n

Adicionar

3 0^{\circ}

a ambos os lados

x - 3 0^{\circ} + 3 0^{\circ} = arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n + 3 0^{\circ}

Simplificar

x = arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n + 3 0^{\circ}

x = arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n + 3 0^{\circ}

Resolver

x - 3 0^{\circ} = 18 0^{\circ} - arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n : x = 18 0^{\circ} - arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n + 3 0^{\circ}

x - 3 0^{\circ} = 18 0^{\circ} - arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n

Mova

3 0^{\circ}

para o lado direito

x - 3 0^{\circ} = 18 0^{\circ} - arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n

Adicionar

3 0^{\circ}

a ambos os lados

x - 3 0^{\circ} + 3 0^{\circ} = 18 0^{\circ} - arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n + 3 0^{\circ}

Simplificar

x = 18 0^{\circ} - arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n + 3 0^{\circ}

x = 18 0^{\circ} - arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n + 3 0^{\circ}

x = arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n + 3 0^{\circ}, x = 18 0^{\circ} - arcsin (\frac{6 + 2}{4}) + 36 0^{\circ} n + 3 0^{\circ}

Mostrar soluções na forma decimal

x = 1.30899 \dots + 36 0^{\circ} n + 3 0^{\circ}, x = 18 0^{\circ} - 1.30899 \dots + 36 0^{\circ} n + 3 0^{\circ}

Gráfico

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