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Simplifying 2cos2x + -1coax + -1 = 0 Reorder the terms: -1 + -1acox + 2cos2x = 0 Solving -1 + -1acox + 2cos2x = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1' to each side of the equation. -1 + -1acox + 1 + 2cos2x = 0 + 1 Reorder the terms: -1 + 1 + -1acox + 2cos2x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1acox + 2cos2x = 0 + 1 -1acox + 2cos2x = 0 + 1 Combine like terms: 0 + 1 = 1 -1acox + 2cos2x = 1 Add '-2cos2x' to each side of the equation. -1acox + 2cos2x + -2cos2x = 1 + -2cos2x Combine like terms: 2cos2x + -2cos2x = 0 -1acox + 0 = 1 + -2cos2x -1acox = 1 + -2cos2x Divide each side by '-1cox'. a = -1c-1o-1x-1 + 2s2 Simplifying a = -1c-1o-1x-1 + 2s2
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