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Simplifying 8cos2(4x) + 7 = 11 Remove parenthesis around (4x) 8cos2 * 4x + 7 = 11 Reorder the terms for easier multiplication: 8 * 4cos2 * x + 7 = 11 Multiply 8 * 4 32cos2 * x + 7 = 11 Multiply cos2 * x 32cos2x + 7 = 11 Reorder the terms: 7 + 32cos2x = 11 Solving 7 + 32cos2x = 11 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 32cos2x = 11 + -7 Combine like terms: 7 + -7 = 0 0 + 32cos2x = 11 + -7 32cos2x = 11 + -7 Combine like terms: 11 + -7 = 4 32cos2x = 4 Divide each side by '32os2x'. c = 0.125o-1s-2x-1 Simplifying c = 0.125o-1s-2x-1
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