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Simplifying cos(x) + sin(2x) = 0 Multiply cos * x cosx + sin(2x) = 0 Remove parenthesis around (2x) cosx + ins * 2x = 0 Reorder the terms for easier multiplication: 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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