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Simplifying 1 + -7cos(2x) = 0 Remove parenthesis around (2x) 1 + -7cos * 2x = 0 Reorder the terms for easier multiplication: 1 + -7 * 2cos * x = 0 Multiply -7 * 2 1 + -14cos * x = 0 Multiply cos * x 1 + -14cosx = 0 Solving 1 + -14cosx = 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 + -14cosx = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -14cosx = 0 + -1 -14cosx = 0 + -1 Combine like terms: 0 + -1 = -1 -14cosx = -1 Divide each side by '-14osx'. c = 0.07142857143o-1s-1x-1 Simplifying c = 0.07142857143o-1s-1x-1
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