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Simplifying -2sin2 + cosx + 1 = 0 Reorder the terms: 1 + cosx + -2in2s = 0 Solving 1 + cosx + -2in2s = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + cosx + -1 + -2in2s = 0 + -1 Reorder the terms: 1 + -1 + cosx + -2in2s = 0 + -1 Combine like terms: 1 + -1 = 0 0 + cosx + -2in2s = 0 + -1 cosx + -2in2s = 0 + -1 Combine like terms: 0 + -1 = -1 cosx + -2in2s = -1 Add '2in2s' to each side of the equation. cosx + -2in2s + 2in2s = -1 + 2in2s Combine like terms: -2in2s + 2in2s = 0 cosx + 0 = -1 + 2in2s cosx = -1 + 2in2s Divide each side by 'osx'. c = -1o-1s-1x-1 + 2in2o-1x-1 Simplifying c = -1o-1s-1x-1 + 2in2o-1x-1 Reorder the terms: c = 2in2o-1x-1 + -1o-1s-1x-1
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