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Simplifying 4cos2(2x) + 8cos2x = 7 Remove parenthesis around (2x) 4cos2 * 2x + 8cos2x = 7 Reorder the terms for easier multiplication: 4 * 2cos2 * x + 8cos2x = 7 Multiply 4 * 2 8cos2 * x + 8cos2x = 7 Multiply cos2 * x 8cos2x + 8cos2x = 7 Combine like terms: 8cos2x + 8cos2x = 16cos2x 16cos2x = 7 Solving 16cos2x = 7 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '16os2x'. c = 0.4375o-1s-2x-1 Simplifying c = 0.4375o-1s-2x-1
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