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Simplifying tan(2x) + -2cos(x) = 0 Remove parenthesis around (2x) ant * 2x + -2cos(x) = 0 Reorder the terms for easier multiplication: 2ant * x + -2cos(x) = 0 Multiply ant * x 2antx + -2cos(x) = 0 Multiply cos * x 2antx + -2cosx = 0 Solving 2antx + -2cosx = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2cosx' to each side of the equation. 2antx + -2cosx + 2cosx = 0 + 2cosx Combine like terms: -2cosx + 2cosx = 0 2antx + 0 = 0 + 2cosx 2antx = 0 + 2cosx Remove the zero: 2antx = 2cosx Divide each side by '2ntx'. a = cn-1ost-1 Simplifying a = cn-1ost-1
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