cos(2x)-3cosx+2=0

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Solution for cos(2x)-3cosx+2=0 equation:


Simplifying
cos(2x) + -3cosx + 2 = 0

Remove parenthesis around (2x)
cos * 2x + -3cosx + 2 = 0

Reorder the terms for easier multiplication:
2cos * x + -3cosx + 2 = 0

Multiply cos * x
2cosx + -3cosx + 2 = 0

Reorder the terms:
2 + 2cosx + -3cosx = 0

Combine like terms: 2cosx + -3cosx = -1cosx
2 + -1cosx = 0

Solving
2 + -1cosx = 0

Solving for variable 'c'.

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

Add '-2' to each side of the equation.
2 + -2 + -1cosx = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1cosx = 0 + -2
-1cosx = 0 + -2

Combine like terms: 0 + -2 = -2
-1cosx = -2

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

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

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