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Simplifying 4(2cos2x + -1) + 3cosx = 1 Reorder the terms: 4(-1 + 2cos2x) + 3cosx = 1 (-1 * 4 + 2cos2x * 4) + 3cosx = 1 (-4 + 8cos2x) + 3cosx = 1 Reorder the terms: -4 + 3cosx + 8cos2x = 1 Solving -4 + 3cosx + 8cos2x = 1 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 + 3cosx + 4 + 8cos2x = 1 + 4 Reorder the terms: -4 + 4 + 3cosx + 8cos2x = 1 + 4 Combine like terms: -4 + 4 = 0 0 + 3cosx + 8cos2x = 1 + 4 3cosx + 8cos2x = 1 + 4 Combine like terms: 1 + 4 = 5 3cosx + 8cos2x = 5 Reorder the terms: -5 + 3cosx + 8cos2x = 5 + -5 Combine like terms: 5 + -5 = 0 -5 + 3cosx + 8cos2x = 0 The solution to this equation could not be determined.
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