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Simplifying -2cos2x + 2ain2x = 0 Reorder the terms: 2ain2x + -2cos2x = 0 Solving 2ain2x + -2cos2x = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2cos2x' to each side of the equation. 2ain2x + -2cos2x + 2cos2x = 0 + 2cos2x Combine like terms: -2cos2x + 2cos2x = 0 2ain2x + 0 = 0 + 2cos2x 2ain2x = 0 + 2cos2x Remove the zero: 2ain2x = 2cos2x Divide each side by '2in2x'. a = ci-1n-2os2 Simplifying a = ci-1n-2os2
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