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Simplifying cos2(3x) + cos2(3x) = 1 Remove parenthesis around (3x) cos2 * 3x + cos2(3x) = 1 Reorder the terms for easier multiplication: 3cos2 * x + cos2(3x) = 1 Multiply cos2 * x 3cos2x + cos2(3x) = 1 Remove parenthesis around (3x) 3cos2x + cos2 * 3x = 1 Reorder the terms for easier multiplication: 3cos2x + 3cos2 * x = 1 Multiply cos2 * x 3cos2x + 3cos2x = 1 Combine like terms: 3cos2x + 3cos2x = 6cos2x 6cos2x = 1 Solving 6cos2x = 1 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '6os2x'. c = 0.1666666667o-1s-2x-1 Simplifying c = 0.1666666667o-1s-2x-1
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