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Simplifying cos2(x) + -1sin(2x) = 0 Multiply cos2 * x cos2x + -1sin(2x) = 0 Remove parenthesis around (2x) cos2x + -1ins * 2x = 0 Reorder the terms for easier multiplication: cos2x + -1 * 2ins * x = 0 Multiply -1 * 2 cos2x + -2ins * x = 0 Multiply ins * x cos2x + -2insx = 0 Solving cos2x + -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. cos2x + -2insx + 2insx = 0 + 2insx Combine like terms: -2insx + 2insx = 0 cos2x + 0 = 0 + 2insx cos2x = 0 + 2insx Remove the zero: cos2x = 2insx Divide each side by 'os2x'. c = 2ino-1s-1 Simplifying c = 2ino-1s-1
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