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Simplifying 5cos(2x) + -2sin(2x) = 0 Remove parenthesis around (2x) 5cos * 2x + -2sin(2x) = 0 Reorder the terms for easier multiplication: 5 * 2cos * x + -2sin(2x) = 0 Multiply 5 * 2 10cos * x + -2sin(2x) = 0 Multiply cos * x 10cosx + -2sin(2x) = 0 Remove parenthesis around (2x) 10cosx + -2ins * 2x = 0 Reorder the terms for easier multiplication: 10cosx + -2 * 2ins * x = 0 Multiply -2 * 2 10cosx + -4ins * x = 0 Multiply ins * x 10cosx + -4insx = 0 Solving 10cosx + -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. 10cosx + -4insx + 4insx = 0 + 4insx Combine like terms: -4insx + 4insx = 0 10cosx + 0 = 0 + 4insx 10cosx = 0 + 4insx Remove the zero: 10cosx = 4insx Divide each side by '10osx'. c = 0.4ino-1 Simplifying c = 0.4ino-1
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