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Simplifying 2sin2x + 9cosx + 3 = 0 Reorder the terms: 3 + 9cosx + 2in2sx = 0 Solving 3 + 9cosx + 2in2sx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + 9cosx + -3 + 2in2sx = 0 + -3 Reorder the terms: 3 + -3 + 9cosx + 2in2sx = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 9cosx + 2in2sx = 0 + -3 9cosx + 2in2sx = 0 + -3 Combine like terms: 0 + -3 = -3 9cosx + 2in2sx = -3 Add '-2in2sx' to each side of the equation. 9cosx + 2in2sx + -2in2sx = -3 + -2in2sx Combine like terms: 2in2sx + -2in2sx = 0 9cosx + 0 = -3 + -2in2sx 9cosx = -3 + -2in2sx Divide each side by '9osx'. c = -0.3333333333o-1s-1x-1 + -0.2222222222in2o-1 Simplifying c = -0.3333333333o-1s-1x-1 + -0.2222222222in2o-1 Reorder the terms: c = -0.2222222222in2o-1 + -0.3333333333o-1s-1x-1
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