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Simplifying 5cos(2x) + -23cosx = 0 Remove parenthesis around (2x) 5cos * 2x + -23cosx = 0 Reorder the terms for easier multiplication: 5 * 2cos * x + -23cosx = 0 Multiply 5 * 2 10cos * x + -23cosx = 0 Multiply cos * x 10cosx + -23cosx = 0 Combine like terms: 10cosx + -23cosx = -13cosx -13cosx = 0 Solving -13cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '-13'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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