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Simplifying cos4x + -1sin4x = 1 + -2sin2x Solving cos4x + -1in4sx = 1 + -2in2sx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add 'in4sx' to each side of the equation. cos4x + -1in4sx + in4sx = 1 + -2in2sx + in4sx Combine like terms: -1in4sx + in4sx = 0 cos4x + 0 = 1 + -2in2sx + in4sx cos4x = 1 + -2in2sx + in4sx Divide each side by 'os4x'. c = o-1s-4x-1 + -2in2o-1s-3 + in4o-1s-3 Simplifying c = o-1s-4x-1 + -2in2o-1s-3 + in4o-1s-3 Reorder the terms: c = -2in2o-1s-3 + in4o-1s-3 + o-1s-4x-1
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