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Simplifying Cosx + 2cos2(x) = 0 Multiply cos2 * x osxC + 2cos2x = 0 Reorder the terms: 2cos2x + osxC = 0 Solving 2cos2x + osxC = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1osxC' to each side of the equation. 2cos2x + osxC + -1osxC = 0 + -1osxC Combine like terms: osxC + -1osxC = 0 2cos2x + 0 = 0 + -1osxC 2cos2x = 0 + -1osxC Remove the zero: 2cos2x = -1osxC Divide each side by '2os2x'. c = -0.5s-1C Simplifying c = -0.5s-1C
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