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Simplifying 9cos2x + -5cosx = 0 Reorder the terms: -5cosx + 9cos2x = 0 Solving -5cosx + 9cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Factor out the Greatest Common Factor (GCF), 'cosx'. cosx(-5 + 9s) = 0Subproblem 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 '(-5 + 9s)' equal to zero and attempt to solve: Simplifying -5 + 9s = 0 Solving -5 + 9s = 0 Move all terms containing c to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + 9s = 0 + 5 Combine like terms: -5 + 5 = 0 0 + 9s = 0 + 5 9s = 0 + 5 Combine like terms: 0 + 5 = 5 9s = 5 Add '-9s' to each side of the equation. 9s + -9s = 5 + -9s Combine like terms: 9s + -9s = 0 0 = 5 + -9s Simplifying 0 = 5 + -9s 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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