2cos(2x)=7cos(x)

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Solution for 2cos(2x)=7cos(x) equation:


Simplifying
2cos(2x) = 7cos(x)

Remove parenthesis around (2x)
2cos * 2x = 7cos(x)

Reorder the terms for easier multiplication:
2 * 2cos * x = 7cos(x)

Multiply 2 * 2
4cos * x = 7cos(x)

Multiply cos * x
4cosx = 7cos(x)

Multiply cos * x
4cosx = 7cosx

Solving
4cosx = 7cosx

Solving for variable 'c'.

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

Add '-7cosx' to each side of the equation.
4cosx + -7cosx = 7cosx + -7cosx

Combine like terms: 4cosx + -7cosx = -3cosx
-3cosx = 7cosx + -7cosx

Combine like terms: 7cosx + -7cosx = 0
-3cosx = 0

Divide each side by '-3'.
cosx = 0

Simplifying
cosx = 0

The solution to this equation could not be determined.

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