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Simplifying 6cos(2x) = 6cos2(x) + -5 Remove parenthesis around (2x) 6cos * 2x = 6cos2(x) + -5 Reorder the terms for easier multiplication: 6 * 2cos * x = 6cos2(x) + -5 Multiply 6 * 2 12cos * x = 6cos2(x) + -5 Multiply cos * x 12cosx = 6cos2(x) + -5 Multiply cos2 * x 12cosx = 6cos2x + -5 Reorder the terms: 12cosx = -5 + 6cos2x Solving 12cosx = -5 + 6cos2x Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-6cos2x' to each side of the equation. 12cosx + -6cos2x = -5 + 6cos2x + -6cos2x Combine like terms: 6cos2x + -6cos2x = 0 12cosx + -6cos2x = -5 + 0 12cosx + -6cos2x = -5 Reorder the terms: 5 + 12cosx + -6cos2x = -5 + 5 Combine like terms: -5 + 5 = 0 5 + 12cosx + -6cos2x = 0 The solution to this equation could not be determined.
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