cos^2x+2cosx=-1

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Solution for cos^2x+2cosx=-1 equation: 


Simplifying
cos2x + 2cosx = -1

Reorder the terms:
2cosx + cos2x = -1

Solving
2cosx + cos2x = -1

Solving for variable 'c'.

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

Reorder the terms:
1 + 2cosx + cos2x = -1 + 1

Combine like terms: -1 + 1 = 0
1 + 2cosx + cos2x = 0

The solution to this equation could not be determined.

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