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Simplifying Cos2x + 5cosx + 6 = 0 Reorder the terms: 6 + 5cosx + os2xC = 0 Solving 6 + 5cosx + os2xC = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + 5cosx + -6 + os2xC = 0 + -6 Reorder the terms: 6 + -6 + 5cosx + os2xC = 0 + -6 Combine like terms: 6 + -6 = 0 0 + 5cosx + os2xC = 0 + -6 5cosx + os2xC = 0 + -6 Combine like terms: 0 + -6 = -6 5cosx + os2xC = -6 Add '-1os2xC' to each side of the equation. 5cosx + os2xC + -1os2xC = -6 + -1os2xC Combine like terms: os2xC + -1os2xC = 0 5cosx + 0 = -6 + -1os2xC 5cosx = -6 + -1os2xC Divide each side by '5osx'. c = -1.2o-1s-1x-1 + -0.2sC Simplifying c = -1.2o-1s-1x-1 + -0.2sC
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