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Simplifying cos(2x) + sinx = 0 Remove parenthesis around (2x) cos * 2x + sinx = 0 Reorder the terms for easier multiplication: 2cos * x + sinx = 0 Multiply cos * x 2cosx + sinx = 0 Solving 2cosx + 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. 2cosx + insx + -1insx = 0 + -1insx Combine like terms: insx + -1insx = 0 2cosx + 0 = 0 + -1insx 2cosx = 0 + -1insx Remove the zero: 2cosx = -1insx Divide each side by '2osx'. c = -0.5ino-1 Simplifying c = -0.5ino-1
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