2cos^3(3x)+2cos^2(3x)-3cos(3x)-3=0

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Solution for 2cos^3(3x)+2cos^2(3x)-3cos(3x)-3=0 equation:


Simplifying
2cos3(3x) + 2cos2(3x) + -3cos(3x) + -3 = 0

Remove parenthesis around (3x)
2cos3 * 3x + 2cos2(3x) + -3cos(3x) + -3 = 0

Reorder the terms for easier multiplication:
2 * 3cos3 * x + 2cos2(3x) + -3cos(3x) + -3 = 0

Multiply 2 * 3
6cos3 * x + 2cos2(3x) + -3cos(3x) + -3 = 0

Multiply cos3 * x
6cos3x + 2cos2(3x) + -3cos(3x) + -3 = 0

Remove parenthesis around (3x)
6cos3x + 2cos2 * 3x + -3cos(3x) + -3 = 0

Reorder the terms for easier multiplication:
6cos3x + 2 * 3cos2 * x + -3cos(3x) + -3 = 0

Multiply 2 * 3
6cos3x + 6cos2 * x + -3cos(3x) + -3 = 0

Multiply cos2 * x
6cos3x + 6cos2x + -3cos(3x) + -3 = 0

Remove parenthesis around (3x)
6cos3x + 6cos2x + -3cos * 3x + -3 = 0

Reorder the terms for easier multiplication:
6cos3x + 6cos2x + -3 * 3cos * x + -3 = 0

Multiply -3 * 3
6cos3x + 6cos2x + -9cos * x + -3 = 0

Multiply cos * x
6cos3x + 6cos2x + -9cosx + -3 = 0

Reorder the terms:
-3 + -9cosx + 6cos2x + 6cos3x = 0

Solving
-3 + -9cosx + 6cos2x + 6cos3x = 0

Solving for variable 'c'.

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

Add '3' to each side of the equation.
-3 + -9cosx + 6cos2x + 3 + 6cos3x = 0 + 3

Reorder the terms:
-3 + 3 + -9cosx + 6cos2x + 6cos3x = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -9cosx + 6cos2x + 6cos3x = 0 + 3
-9cosx + 6cos2x + 6cos3x = 0 + 3

Combine like terms: 0 + 3 = 3
-9cosx + 6cos2x + 6cos3x = 3

Reorder the terms:
-3 + -9cosx + 6cos2x + 6cos3x = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + -9cosx + 6cos2x + 6cos3x = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-1 + -3cosx + 2cos2x + 2cos3x) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-1 + -3cosx + 2cos2x + 2cos3x)' equal to zero and attempt to solve: Simplifying -1 + -3cosx + 2cos2x + 2cos3x = 0 Solving -1 + -3cosx + 2cos2x + 2cos3x = 0 Move all terms containing c to the left, all other terms to the right. Add '1' to each side of the equation. -1 + -3cosx + 2cos2x + 1 + 2cos3x = 0 + 1 Reorder the terms: -1 + 1 + -3cosx + 2cos2x + 2cos3x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -3cosx + 2cos2x + 2cos3x = 0 + 1 -3cosx + 2cos2x + 2cos3x = 0 + 1 Combine like terms: 0 + 1 = 1 -3cosx + 2cos2x + 2cos3x = 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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