-cos^2x-6cosx-5=0

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Solution for -cos^2x-6cosx-5=0 equation:


Simplifying
-1cos2x + -6cosx + -5 = 0

Reorder the terms:
-5 + -6cosx + -1cos2x = 0

Solving
-5 + -6cosx + -1cos2x = 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 + -6cosx + 5 + -1cos2x = 0 + 5

Reorder the terms:
-5 + 5 + -6cosx + -1cos2x = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -6cosx + -1cos2x = 0 + 5
-6cosx + -1cos2x = 0 + 5

Combine like terms: 0 + 5 = 5
-6cosx + -1cos2x = 5

Reorder the terms:
-5 + -6cosx + -1cos2x = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + -6cosx + -1cos2x = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(5 + 6cosx + cos2x) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(5 + 6cosx + cos2x)' equal to zero and attempt to solve: Simplifying 5 + 6cosx + cos2x = 0 Solving 5 + 6cosx + cos2x = 0 Move all terms containing c to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + 6cosx + -5 + cos2x = 0 + -5 Reorder the terms: 5 + -5 + 6cosx + cos2x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 6cosx + cos2x = 0 + -5 6cosx + cos2x = 0 + -5 Combine like terms: 0 + -5 = -5 6cosx + cos2x = -5 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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