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Simplifying -1sin(x) + 2cos(2x) = 0 Multiply ins * x -1insx + 2cos(2x) = 0 Remove parenthesis around (2x) -1insx + 2cos * 2x = 0 Reorder the terms for easier multiplication: -1insx + 2 * 2cos * x = 0 Multiply 2 * 2 -1insx + 4cos * x = 0 Multiply cos * x -1insx + 4cosx = 0 Reorder the terms: 4cosx + -1insx = 0 Solving 4cosx + -1insx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add 'insx' to each side of the equation. 4cosx + -1insx + insx = 0 + insx Combine like terms: -1insx + insx = 0 4cosx + 0 = 0 + insx 4cosx = 0 + insx Remove the zero: 4cosx = insx Divide each side by '4osx'. c = 0.25ino-1 Simplifying c = 0.25ino-1
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