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Simplifying 3(cos(2x)) + -14(cosx) + 7 = 0 Remove parenthesis around (2x) 3(cos * 2x) + -14(cosx) + 7 = 0 Reorder the terms for easier multiplication: 3(2cos * x) + -14(cosx) + 7 = 0 Multiply cos * x 3(2cosx) + -14(cosx) + 7 = 0 Remove parenthesis around (2cosx) 3 * 2cosx + -14(cosx) + 7 = 0 Multiply 3 * 2 6cosx + -14(cosx) + 7 = 0 Reorder the terms: 7 + 6cosx + -14cosx = 0 Combine like terms: 6cosx + -14cosx = -8cosx 7 + -8cosx = 0 Solving 7 + -8cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -8cosx = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -8cosx = 0 + -7 -8cosx = 0 + -7 Combine like terms: 0 + -7 = -7 -8cosx = -7 Divide each side by '-8osx'. c = 0.875o-1s-1x-1 Simplifying c = 0.875o-1s-1x-1
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