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Simplifying cos2(2x) + sin2(2x) = 0 Remove parenthesis around (2x) cos2 * 2x + sin2(2x) = 0 Reorder the terms for easier multiplication: 2cos2 * x + sin2(2x) = 0 Multiply cos2 * x 2cos2x + sin2(2x) = 0 Remove parenthesis around (2x) 2cos2x + in2s * 2x = 0 Reorder the terms for easier multiplication: 2cos2x + 2in2s * x = 0 Multiply in2s * x 2cos2x + 2in2sx = 0 Solving 2cos2x + 2in2sx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-2in2sx' to each side of the equation. 2cos2x + 2in2sx + -2in2sx = 0 + -2in2sx Combine like terms: 2in2sx + -2in2sx = 0 2cos2x + 0 = 0 + -2in2sx 2cos2x = 0 + -2in2sx Remove the zero: 2cos2x = -2in2sx Divide each side by '2os2x'. c = -1in2o-1s-1 Simplifying c = -1in2o-1s-1
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