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