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Simplifying 3cos(2x) + -5cos(x) = 1 Remove parenthesis around (2x) 3cos * 2x + -5cos(x) = 1 Reorder the terms for easier multiplication: 3 * 2cos * x + -5cos(x) = 1 Multiply 3 * 2 6cos * x + -5cos(x) = 1 Multiply cos * x 6cosx + -5cos(x) = 1 Multiply cos * x 6cosx + -5cosx = 1 Combine like terms: 6cosx + -5cosx = 1cosx 1cosx = 1 Solving 1cosx = 1 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '1osx'. c = o-1s-1x-1 Simplifying c = o-1s-1x-1
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