cos(2x)+11cos(x)+5=0

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Solution for cos(2x)+11cos(x)+5=0 equation:


Simplifying
cos(2x) + 11cos(x) + 5 = 0

Remove parenthesis around (2x)
cos * 2x + 11cos(x) + 5 = 0

Reorder the terms for easier multiplication:
2cos * x + 11cos(x) + 5 = 0

Multiply cos * x
2cosx + 11cos(x) + 5 = 0

Multiply cos * x
2cosx + 11cosx + 5 = 0

Reorder the terms:
5 + 2cosx + 11cosx = 0

Combine like terms: 2cosx + 11cosx = 13cosx
5 + 13cosx = 0

Solving
5 + 13cosx = 0

Solving for variable 'c'.

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

Add '-5' to each side of the equation.
5 + -5 + 13cosx = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 13cosx = 0 + -5
13cosx = 0 + -5

Combine like terms: 0 + -5 = -5
13cosx = -5

Divide each side by '13osx'.
c = -0.3846153846o-1s-1x-1

Simplifying
c = -0.3846153846o-1s-1x-1

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