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