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