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Simplifying Cos2(2x) + 7cos(2x) + -2 = 0 Remove parenthesis around (2x) os2C * 2x + 7cos(2x) + -2 = 0 Reorder the terms for easier multiplication: 2os2C * x + 7cos(2x) + -2 = 0 Multiply os2C * x 2os2xC + 7cos(2x) + -2 = 0 Remove parenthesis around (2x) 2os2xC + 7cos * 2x + -2 = 0 Reorder the terms for easier multiplication: 2os2xC + 7 * 2cos * x + -2 = 0 Multiply 7 * 2 2os2xC + 14cos * x + -2 = 0 Multiply cos * x 2os2xC + 14cosx + -2 = 0 Reorder the terms: -2 + 14cosx + 2os2xC = 0 Solving -2 + 14cosx + 2os2xC = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 14cosx + 2 + 2os2xC = 0 + 2 Reorder the terms: -2 + 2 + 14cosx + 2os2xC = 0 + 2 Combine like terms: -2 + 2 = 0 0 + 14cosx + 2os2xC = 0 + 2 14cosx + 2os2xC = 0 + 2 Combine like terms: 0 + 2 = 2 14cosx + 2os2xC = 2 Add '-2os2xC' to each side of the equation. 14cosx + 2os2xC + -2os2xC = 2 + -2os2xC Combine like terms: 2os2xC + -2os2xC = 0 14cosx + 0 = 2 + -2os2xC 14cosx = 2 + -2os2xC Divide each side by '14osx'. c = 0.1428571429o-1s-1x-1 + -0.1428571429sC Simplifying c = 0.1428571429o-1s-1x-1 + -0.1428571429sC
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