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Simplifying cos(2x) * sin(x) + sin(x) = 0 Remove parenthesis around (2x) cos * 2x * sin(x) + sin(x) = 0 Reorder the terms for easier multiplication: 2cos * x * ins * x + sin(x) = 0 Multiply cos * x 2cosx * ins * x + sin(x) = 0 Multiply cosx * ins 2cinos2x * x + sin(x) = 0 Multiply cinos2x * x 2cinos2x2 + sin(x) = 0 Multiply ins * x 2cinos2x2 + insx = 0 Solving 2cinos2x2 + insx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1insx' to each side of the equation. 2cinos2x2 + insx + -1insx = 0 + -1insx Combine like terms: insx + -1insx = 0 2cinos2x2 + 0 = 0 + -1insx 2cinos2x2 = 0 + -1insx Remove the zero: 2cinos2x2 = -1insx Divide each side by '2inos2x2'. c = -0.5o-1s-1x-1 Simplifying c = -0.5o-1s-1x-1
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