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Simplifying -4sin(x) + -4cos(2x) = 0 Multiply ins * x -4insx + -4cos(2x) = 0 Remove parenthesis around (2x) -4insx + -4cos * 2x = 0 Reorder the terms for easier multiplication: -4insx + -4 * 2cos * x = 0 Multiply -4 * 2 -4insx + -8cos * x = 0 Multiply cos * x -4insx + -8cosx = 0 Reorder the terms: -8cosx + -4insx = 0 Solving -8cosx + -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. -8cosx + -4insx + 4insx = 0 + 4insx Combine like terms: -4insx + 4insx = 0 -8cosx + 0 = 0 + 4insx -8cosx = 0 + 4insx Remove the zero: -8cosx = 4insx Divide each side by '-8osx'. c = -0.5ino-1 Simplifying c = -0.5ino-1
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