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Simplifying cos(3x) + 5 = 13 Remove parenthesis around (3x) cos * 3x + 5 = 13 Reorder the terms for easier multiplication: 3cos * x + 5 = 13 Multiply cos * x 3cosx + 5 = 13 Reorder the terms: 5 + 3cosx = 13 Solving 5 + 3cosx = 13 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 3cosx = 13 + -5 Combine like terms: 5 + -5 = 0 0 + 3cosx = 13 + -5 3cosx = 13 + -5 Combine like terms: 13 + -5 = 8 3cosx = 8 Divide each side by '3osx'. c = 2.666666667o-1s-1x-1 Simplifying c = 2.666666667o-1s-1x-1
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