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Simplifying cos2(x) + 6cos(x) + 4 = 0 Multiply cos2 * x cos2x + 6cos(x) + 4 = 0 Multiply cos * x cos2x + 6cosx + 4 = 0 Reorder the terms: 4 + 6cosx + cos2x = 0 Solving 4 + 6cosx + cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + 6cosx + -4 + cos2x = 0 + -4 Reorder the terms: 4 + -4 + 6cosx + cos2x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 6cosx + cos2x = 0 + -4 6cosx + cos2x = 0 + -4 Combine like terms: 0 + -4 = -4 6cosx + cos2x = -4 Reorder the terms: 4 + 6cosx + cos2x = -4 + 4 Combine like terms: -4 + 4 = 0 4 + 6cosx + cos2x = 0 The solution to this equation could not be determined.
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