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Simplifying cos(x) + -2sin(2x) = 0 Multiply cos * x cosx + -2sin(2x) = 0 Remove parenthesis around (2x) cosx + -2ins * 2x = 0 Reorder the terms for easier multiplication: cosx + -2 * 2ins * x = 0 Multiply -2 * 2 cosx + -4ins * x = 0 Multiply ins * x cosx + -4insx = 0 Solving cosx + -4insx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '4insx' to each side of the equation. cosx + -4insx + 4insx = 0 + 4insx Combine like terms: -4insx + 4insx = 0 cosx + 0 = 0 + 4insx cosx = 0 + 4insx Remove the zero: cosx = 4insx Divide each side by 'osx'. c = 4ino-1 Simplifying c = 4ino-1
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