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Simplifying Cos(2x) + -3cos(x) + -1 = 0 Remove parenthesis around (2x) osC * 2x + -3cos(x) + -1 = 0 Reorder the terms for easier multiplication: 2osC * x + -3cos(x) + -1 = 0 Multiply osC * x 2osxC + -3cos(x) + -1 = 0 Multiply cos * x 2osxC + -3cosx + -1 = 0 Reorder the terms: -1 + -3cosx + 2osxC = 0 Solving -1 + -3cosx + 2osxC = 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 + -3cosx + 1 + 2osxC = 0 + 1 Reorder the terms: -1 + 1 + -3cosx + 2osxC = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -3cosx + 2osxC = 0 + 1 -3cosx + 2osxC = 0 + 1 Combine like terms: 0 + 1 = 1 -3cosx + 2osxC = 1 Add '-2osxC' to each side of the equation. -3cosx + 2osxC + -2osxC = 1 + -2osxC Combine like terms: 2osxC + -2osxC = 0 -3cosx + 0 = 1 + -2osxC -3cosx = 1 + -2osxC Divide each side by '-3osx'. c = -0.3333333333o-1s-1x-1 + 0.6666666667C Simplifying c = -0.3333333333o-1s-1x-1 + 0.6666666667C Reorder the terms: c = 0.6666666667C + -0.3333333333o-1s-1x-1
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