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Simplifying cos2(x) + -4cos(x) + 2 = 0 Multiply cos2 * x cos2x + -4cos(x) + 2 = 0 Multiply cos * x cos2x + -4cosx + 2 = 0 Reorder the terms: 2 + -4cosx + cos2x = 0 Solving 2 + -4cosx + cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -4cosx + -2 + cos2x = 0 + -2 Reorder the terms: 2 + -2 + -4cosx + cos2x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -4cosx + cos2x = 0 + -2 -4cosx + cos2x = 0 + -2 Combine like terms: 0 + -2 = -2 -4cosx + cos2x = -2 Reorder the terms: 2 + -4cosx + cos2x = -2 + 2 Combine like terms: -2 + 2 = 0 2 + -4cosx + cos2x = 0 The solution to this equation could not be determined.
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