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Popular Trigonometria >

cos(2pix)*2pi+2pi=0

Solução

cos (2 π x) \cdot 2 π + 2 π = 0

Solução

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

+1

Graus

x = 28.64788 \dots^{\circ}

Passos da solução

cos (2 π x) \cdot 2 π + 2 π = 0

Mova

2 π

para o lado direito

cos (2 π x) \cdot 2 π + 2 π = 0

Subtrair

2 π

de ambos os lados

cos (2 π x) \cdot 2 π + 2 π - 2 π = 0 - 2 π

Simplificar

cos (2 π x) \cdot 2 π = - 2 π

cos (2 π x) \cdot 2 π = - 2 π

Dividir ambos os lados por

2 π

cos (2 π x) \cdot 2 π = - 2 π

Dividir ambos os lados por

2 π

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

Simplificar

cos (2 π x) = - 1

cos (2 π x) = - 1

Soluções gerais para

cos (2 π x) = - 1

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}

2 π x = π + 2 πn

2 π x = π + 2 πn

Resolver

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

2 π x = π + 2 πn

Dividir ambos os lados por

2 π

2 π x = π + 2 πn

Dividir ambos os lados por

2 π

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

Simplificar

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

Simplificar

\frac{2 π x}{2 π} : x

\frac{2 π x}{2 π}

Dividir:

\frac{2}{2} = 1

= \frac{π x}{π}

Eliminar o fator comum:

π

= x

Simplificar

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

\frac{π}{2 π} + \frac{2 πn}{2 π}

Cancelar

\frac{π}{2 π} : \frac{1}{2}

\frac{π}{2 π}

Eliminar o fator comum:

π

= \frac{1}{2}

= \frac{1}{2} + \frac{2 πn}{2 π}

Cancelar

\frac{2 πn}{2 π} : n

\frac{2 πn}{2 π}

Cancelar

\frac{2 πn}{2 π} : n

\frac{2 πn}{2 π}

Dividir:

\frac{2}{2} = 1

= \frac{πn}{π}

Eliminar o fator comum:

π

= n

= n

= \frac{1}{2} + n

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

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

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

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

Gráfico

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