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Simplifying r2 = 4cos(2x) Remove parenthesis around (2x) r2 = 4cos * 2x Reorder the terms for easier multiplication: r2 = 4 * 2cos * x Multiply 4 * 2 r2 = 8cos * x Multiply cos * x r2 = 8cosx Solving r2 = 8cosx Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Simplifying r2 = 8cosx Reorder the terms: -8cosx + r2 = 8cosx + -8cosx Combine like terms: 8cosx + -8cosx = 0 -8cosx + r2 = 0 The solution to this equation could not be determined.
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