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Simplifying 2cos2(3x) + 3cos(3x) + -2 = 0 Remove parenthesis around (3x) 2cos2 * 3x + 3cos(3x) + -2 = 0 Reorder the terms for easier multiplication: 2 * 3cos2 * x + 3cos(3x) + -2 = 0 Multiply 2 * 3 6cos2 * x + 3cos(3x) + -2 = 0 Multiply cos2 * x 6cos2x + 3cos(3x) + -2 = 0 Remove parenthesis around (3x) 6cos2x + 3cos * 3x + -2 = 0 Reorder the terms for easier multiplication: 6cos2x + 3 * 3cos * x + -2 = 0 Multiply 3 * 3 6cos2x + 9cos * x + -2 = 0 Multiply cos * x 6cos2x + 9cosx + -2 = 0 Reorder the terms: -2 + 9cosx + 6cos2x = 0 Solving -2 + 9cosx + 6cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 9cosx + 2 + 6cos2x = 0 + 2 Reorder the terms: -2 + 2 + 9cosx + 6cos2x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + 9cosx + 6cos2x = 0 + 2 9cosx + 6cos2x = 0 + 2 Combine like terms: 0 + 2 = 2 9cosx + 6cos2x = 2 Reorder the terms: -2 + 9cosx + 6cos2x = 2 + -2 Combine like terms: 2 + -2 = 0 -2 + 9cosx + 6cos2x = 0 The solution to this equation could not be determined.
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