cos(x)=cos(3x)

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Solution for cos(x)=cos(3x) equation:


Simplifying
cos(x) = cos(3x)

Multiply cos * x
cosx = cos(3x)

Remove parenthesis around (3x)
cosx = cos * 3x

Reorder the terms for easier multiplication:
cosx = 3cos * x

Multiply cos * x
cosx = 3cosx

Solving
cosx = 3cosx

Solving for variable 'c'.

Move all terms containing c to the left, all other terms to the right.

Add '-3cosx' to each side of the equation.
cosx + -3cosx = 3cosx + -3cosx

Combine like terms: cosx + -3cosx = -2cosx
-2cosx = 3cosx + -3cosx

Combine like terms: 3cosx + -3cosx = 0
-2cosx = 0

Divide each side by '-2'.
cosx = 0

Simplifying
cosx = 0

The solution to this equation could not be determined.

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