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Simplifying 2cos2(x) + -4 = 7cos(x) Multiply cos2 * x 2cos2x + -4 = 7cos(x) Reorder the terms: -4 + 2cos2x = 7cos(x) Multiply cos * x -4 + 2cos2x = 7cosx Solving -4 + 2cos2x = 7cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-7cosx' to each side of the equation. -4 + -7cosx + 2cos2x = 7cosx + -7cosx Combine like terms: 7cosx + -7cosx = 0 -4 + -7cosx + 2cos2x = 0 Add '4' to each side of the equation. -4 + -7cosx + 4 + 2cos2x = 0 + 4 Reorder the terms: -4 + 4 + -7cosx + 2cos2x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -7cosx + 2cos2x = 0 + 4 -7cosx + 2cos2x = 0 + 4 Combine like terms: 0 + 4 = 4 -7cosx + 2cos2x = 4 Reorder the terms: -4 + -7cosx + 2cos2x = 4 + -4 Combine like terms: 4 + -4 = 0 -4 + -7cosx + 2cos2x = 0 The solution to this equation could not be determined.
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