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Simplifying Cos2x + -4cosx + 1 = k Reorder the terms: 1 + -4cosx + os2xC = k Solving 1 + -4cosx + os2xC = k 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 + -4cosx + -1 + os2xC = -1 + k Reorder the terms: 1 + -1 + -4cosx + os2xC = -1 + k Combine like terms: 1 + -1 = 0 0 + -4cosx + os2xC = -1 + k -4cosx + os2xC = -1 + k Add '-1os2xC' to each side of the equation. -4cosx + os2xC + -1os2xC = -1 + k + -1os2xC Combine like terms: os2xC + -1os2xC = 0 -4cosx + 0 = -1 + k + -1os2xC -4cosx = -1 + k + -1os2xC Divide each side by '-4osx'. c = 0.25o-1s-1x-1 + -0.25ko-1s-1x-1 + 0.25sC Simplifying c = 0.25o-1s-1x-1 + -0.25ko-1s-1x-1 + 0.25sC Reorder the terms: c = -0.25ko-1s-1x-1 + 0.25o-1s-1x-1 + 0.25sC
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