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Simplifying 7cos * x + 5cos * 2x = 0 Multiply cos * x 7cosx + 5cos * 2x = 0 Reorder the terms for easier multiplication: 7cosx + 5 * 2cos * x = 0 Multiply 5 * 2 7cosx + 10cos * x = 0 Multiply cos * x 7cosx + 10cosx = 0 Combine like terms: 7cosx + 10cosx = 17cosx 17cosx = 0 Solving 17cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '17'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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