4cos(x)=cos(2x)

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


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

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

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

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

Multiply cos * x
4cosx = 2cosx

Solving
4cosx = 2cosx

Solving for variable 'c'.

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

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

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

Combine like terms: 2cosx + -2cosx = 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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