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Simplifying 0.68 = 2cos2(x) + -1 Multiply cos2 * x 0.68 = 2cos2x + -1 Reorder the terms: 0.68 = -1 + 2cos2x Solving 0.68 = -1 + 2cos2x Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-2cos2x' to each side of the equation. 0.68 + -2cos2x = -1 + 2cos2x + -2cos2x Combine like terms: 2cos2x + -2cos2x = 0 0.68 + -2cos2x = -1 + 0 0.68 + -2cos2x = -1 Add '-0.68' to each side of the equation. 0.68 + -0.68 + -2cos2x = -1 + -0.68 Combine like terms: 0.68 + -0.68 = 0.00 0.00 + -2cos2x = -1 + -0.68 -2cos2x = -1 + -0.68 Combine like terms: -1 + -0.68 = -1.68 -2cos2x = -1.68 Divide each side by '-2os2x'. c = 0.84o-1s-2x-1 Simplifying c = 0.84o-1s-2x-1
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