cos(3x)=cosx

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Solution for cos(3x)=cosx equation:


Simplifying
cos(3x) = cosx

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

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

Multiply cos * x
3cosx = cosx

Solving
3cosx = cosx

Solving for variable 'c'.

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

Add '-1cosx' to each side of the equation.
3cosx + -1cosx = cosx + -1cosx

Combine like terms: 3cosx + -1cosx = 2cosx
2cosx = cosx + -1cosx

Combine like terms: cosx + -1cosx = 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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