2cos(2x)-5cos(x)+2=0

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Solution for 2cos(2x)-5cos(x)+2=0 equation:


Simplifying
2cos(2x) + -5cos(x) + 2 = 0

Remove parenthesis around (2x)
2cos * 2x + -5cos(x) + 2 = 0

Reorder the terms for easier multiplication:
2 * 2cos * x + -5cos(x) + 2 = 0

Multiply 2 * 2
4cos * x + -5cos(x) + 2 = 0

Multiply cos * x
4cosx + -5cos(x) + 2 = 0

Multiply cos * x
4cosx + -5cosx + 2 = 0

Reorder the terms:
2 + 4cosx + -5cosx = 0

Combine like terms: 4cosx + -5cosx = -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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