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Simplifying cosx + -1sin(2x) = 0 Remove parenthesis around (2x) cosx + -1ins * 2x = 0 Reorder the terms for easier multiplication: cosx + -1 * 2ins * x = 0 Multiply -1 * 2 cosx + -2ins * x = 0 Multiply ins * x cosx + -2insx = 0 Solving cosx + -2insx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '2insx' to each side of the equation. cosx + -2insx + 2insx = 0 + 2insx Combine like terms: -2insx + 2insx = 0 cosx + 0 = 0 + 2insx cosx = 0 + 2insx Remove the zero: cosx = 2insx Divide each side by 'osx'. c = 2ino^{-1}Simplifying c = 2ino^{-1}

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