cos(2x)-3cosx=-2

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Solution for cos(2x)-3cosx=-2 equation: 


Simplifying
cos(2x) + -3cosx = -2

Remove parenthesis around (2x)
cos * 2x + -3cosx = -2

Reorder the terms for easier multiplication:
2cos * x + -3cosx = -2

Multiply cos * x
2cosx + -3cosx = -2

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

Solving
-1cosx = -2

Solving for variable 'c'.

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

Divide each side by '-1osx'.
c = 2o-1s-1x-1

Simplifying
c = 2o-1s-1x-1

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