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Simplifying 3cos(2x) + 4cos(x) + 1 = 0 Remove parenthesis around (2x) 3cos * 2x + 4cos(x) + 1 = 0 Reorder the terms for easier multiplication: 3 * 2cos * x + 4cos(x) + 1 = 0 Multiply 3 * 2 6cos * x + 4cos(x) + 1 = 0 Multiply cos * x 6cosx + 4cos(x) + 1 = 0 Multiply cos * x 6cosx + 4cosx + 1 = 0 Reorder the terms: 1 + 6cosx + 4cosx = 0 Combine like terms: 6cosx + 4cosx = 10cosx 1 + 10cosx = 0 Solving 1 + 10cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 10cosx = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 10cosx = 0 + -1 10cosx = 0 + -1 Combine like terms: 0 + -1 = -1 10cosx = -1 Divide each side by '10osx'. c = -0.1o-1s-1x-1 Simplifying c = -0.1o-1s-1x-1
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