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Simplifying cos(10x) = cos(3x) Remove parenthesis around (10x) cos * 10x = cos(3x) Reorder the terms for easier multiplication: 10cos * x = cos(3x) Multiply cos * x 10cosx = cos(3x) Remove parenthesis around (3x) 10cosx = cos * 3x Reorder the terms for easier multiplication: 10cosx = 3cos * x Multiply cos * x 10cosx = 3cosx Solving 10cosx = 3cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-3cosx' to each side of the equation. 10cosx + -3cosx = 3cosx + -3cosx Combine like terms: 10cosx + -3cosx = 7cosx 7cosx = 3cosx + -3cosx Combine like terms: 3cosx + -3cosx = 0 7cosx = 0 Divide each side by '7'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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