7*cos^2*x-cos*x-8=0

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Solution for 7*cos^2*x-cos*x-8=0 equation:


Simplifying
7cos2 * x + -1cos * x + -8 = 0

Multiply cos2 * x
7cos2x + -1cos * x + -8 = 0

Multiply cos * x
7cos2x + -1cosx + -8 = 0

Reorder the terms:
-8 + -1cosx + 7cos2x = 0

Solving
-8 + -1cosx + 7cos2x = 0

Solving for variable 'c'.

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

Add '8' to each side of the equation.
-8 + -1cosx + 8 + 7cos2x = 0 + 8

Reorder the terms:
-8 + 8 + -1cosx + 7cos2x = 0 + 8

Combine like terms: -8 + 8 = 0
0 + -1cosx + 7cos2x = 0 + 8
-1cosx + 7cos2x = 0 + 8

Combine like terms: 0 + 8 = 8
-1cosx + 7cos2x = 8

Reorder the terms:
-8 + -1cosx + 7cos2x = 8 + -8

Combine like terms: 8 + -8 = 0
-8 + -1cosx + 7cos2x = 0

The solution to this equation could not be determined.

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