2cos^2x=-1cosx

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


Simplifying
2cos2x = -1cosx

Solving
2cos2x = -1cosx

Solving for variable 'c'.

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

Add 'cosx' to each side of the equation.
cosx + 2cos2x = -1cosx + cosx

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

Factor out the Greatest Common Factor (GCF), 'cosx'.
cosx(1 + 2s) = 0

Subproblem 1

Set the factor 'cosx' equal to zero and attempt to solve: Simplifying cosx = 0 Solving cosx = 0 Move all terms containing c to the left, all other terms to the right. Simplifying cosx = 0 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(1 + 2s)' equal to zero and attempt to solve: Simplifying 1 + 2s = 0 Solving 1 + 2s = 0 Move all terms containing c to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 2s = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2s = 0 + -1 2s = 0 + -1 Combine like terms: 0 + -1 = -1 2s = -1 Add '-2s' to each side of the equation. 2s + -2s = -1 + -2s Combine like terms: 2s + -2s = 0 0 = -1 + -2s Simplifying 0 = -1 + -2s The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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