9cos(2x)=27cos-18

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Solution for 9cos(2x)=27cos-18 equation:


Simplifying
9cos(2x) = 27cos + -18

Remove parenthesis around (2x)
9cos * 2x = 27cos + -18

Reorder the terms for easier multiplication:
9 * 2cos * x = 27cos + -18

Multiply 9 * 2
18cos * x = 27cos + -18

Multiply cos * x
18cosx = 27cos + -18

Reorder the terms:
18cosx = -18 + 27cos

Solving
18cosx = -18 + 27cos

Solving for variable 'c'.

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

Add '-27cos' to each side of the equation.
-27cos + 18cosx = -18 + 27cos + -27cos

Combine like terms: 27cos + -27cos = 0
-27cos + 18cosx = -18 + 0
-27cos + 18cosx = -18

Reorder the terms:
18 + -27cos + 18cosx = -18 + 18

Combine like terms: -18 + 18 = 0
18 + -27cos + 18cosx = 0

Factor out the Greatest Common Factor (GCF), '9'.
9(2 + -3cos + 2cosx) = 0

Ignore the factor 9.

Subproblem 1

Set the factor '(2 + -3cos + 2cosx)' equal to zero and attempt to solve: Simplifying 2 + -3cos + 2cosx = 0 Solving 2 + -3cos + 2cosx = 0 Move all terms containing c to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -3cos + -2 + 2cosx = 0 + -2 Reorder the terms: 2 + -2 + -3cos + 2cosx = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -3cos + 2cosx = 0 + -2 -3cos + 2cosx = 0 + -2 Combine like terms: 0 + -2 = -2 -3cos + 2cosx = -2 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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