cos(2x)=cos(4x)

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Solution for cos(2x)=cos(4x) equation:


Simplifying
cos(2x) = cos(4x)

Remove parenthesis around (2x)
cos * 2x = cos(4x)

Reorder the terms for easier multiplication:
2cos * x = cos(4x)

Multiply cos * x
2cosx = cos(4x)

Remove parenthesis around (4x)
2cosx = cos * 4x

Reorder the terms for easier multiplication:
2cosx = 4cos * x

Multiply cos * x
2cosx = 4cosx

Solving
2cosx = 4cosx

Solving for variable 'c'.

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

Add '-4cosx' to each side of the equation.
2cosx + -4cosx = 4cosx + -4cosx

Combine like terms: 2cosx + -4cosx = -2cosx
-2cosx = 4cosx + -4cosx

Combine like terms: 4cosx + -4cosx = 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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