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Simplifying 8cos2(x) + -2cos(x) + -1 = 1 Multiply cos2 * x 8cos2x + -2cos(x) + -1 = 1 Multiply cos * x 8cos2x + -2cosx + -1 = 1 Reorder the terms: -1 + -2cosx + 8cos2x = 1 Solving -1 + -2cosx + 8cos2x = 1 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '1' to each side of the equation. -1 + -2cosx + 1 + 8cos2x = 1 + 1 Reorder the terms: -1 + 1 + -2cosx + 8cos2x = 1 + 1 Combine like terms: -1 + 1 = 0 0 + -2cosx + 8cos2x = 1 + 1 -2cosx + 8cos2x = 1 + 1 Combine like terms: 1 + 1 = 2 -2cosx + 8cos2x = 2 Reorder the terms: -2 + -2cosx + 8cos2x = 2 + -2 Combine like terms: 2 + -2 = 0 -2 + -2cosx + 8cos2x = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-1 + -1cosx + 4cos2x) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-1 + -1cosx + 4cos2x)' equal to zero and attempt to solve: Simplifying -1 + -1cosx + 4cos2x = 0 Solving -1 + -1cosx + 4cos2x = 0 Move all terms containing c to the left, all other terms to the right. Add '1' to each side of the equation. -1 + -1cosx + 1 + 4cos2x = 0 + 1 Reorder the terms: -1 + 1 + -1cosx + 4cos2x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1cosx + 4cos2x = 0 + 1 -1cosx + 4cos2x = 0 + 1 Combine like terms: 0 + 1 = 1 -1cosx + 4cos2x = 1 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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