2cos(2x)-15cos(x)-2=0

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Solution for 2cos(2x)-15cos(x)-2=0 equation:


Simplifying
2cos(2x) + -15cos(x) + -2 = 0

Remove parenthesis around (2x)
2cos * 2x + -15cos(x) + -2 = 0

Reorder the terms for easier multiplication:
2 * 2cos * x + -15cos(x) + -2 = 0

Multiply 2 * 2
4cos * x + -15cos(x) + -2 = 0

Multiply cos * x
4cosx + -15cos(x) + -2 = 0

Multiply cos * x
4cosx + -15cosx + -2 = 0

Reorder the terms:
-2 + 4cosx + -15cosx = 0

Combine like terms: 4cosx + -15cosx = -11cosx
-2 + -11cosx = 0

Solving
-2 + -11cosx = 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 + -11cosx = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -11cosx = 0 + 2
-11cosx = 0 + 2

Combine like terms: 0 + 2 = 2
-11cosx = 2

Divide each side by '-11osx'.
c = -0.1818181818o-1s-1x-1

Simplifying
c = -0.1818181818o-1s-1x-1

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