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Simplifying 0 = 4cos2x + 2cosx + -3 Reorder the terms: 0 = -3 + 2cosx + 4cos2x Solving 0 = -3 + 2cosx + 4cos2x Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-2cosx' to each side of the equation. 0 + -2cosx = -3 + 2cosx + -2cosx + 4cos2x Remove the zero: -2cosx = -3 + 2cosx + -2cosx + 4cos2x Combine like terms: 2cosx + -2cosx = 0 -2cosx = -3 + 0 + 4cos2x -2cosx = -3 + 4cos2x Add '-4cos2x' to each side of the equation. -2cosx + -4cos2x = -3 + 4cos2x + -4cos2x Combine like terms: 4cos2x + -4cos2x = 0 -2cosx + -4cos2x = -3 + 0 -2cosx + -4cos2x = -3 Reorder the terms: 3 + -2cosx + -4cos2x = -3 + 3 Combine like terms: -3 + 3 = 0 3 + -2cosx + -4cos2x = 0 The solution to this equation could not be determined.
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