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Simplifying sin(7x) * cos(10x) + cos(7x) * sin(10x) = 0 Remove parenthesis around (7x) ins * 7x * cos(10x) + cos(7x) * sin(10x) = 0 Remove parenthesis around (10x) ins * 7x * cos * 10x + cos(7x) * sin(10x) = 0 Reorder the terms for easier multiplication: 7 * 10ins * x * cos * x + cos(7x) * sin(10x) = 0 Multiply 7 * 10 70ins * x * cos * x + cos(7x) * sin(10x) = 0 Multiply ins * x 70insx * cos * x + cos(7x) * sin(10x) = 0 Multiply insx * cos 70cinos2x * x + cos(7x) * sin(10x) = 0 Multiply cinos2x * x 70cinos2x2 + cos(7x) * sin(10x) = 0 Remove parenthesis around (7x) 70cinos2x2 + cos * 7x * sin(10x) = 0 Remove parenthesis around (10x) 70cinos2x2 + cos * 7x * ins * 10x = 0 Reorder the terms for easier multiplication: 70cinos2x2 + 7 * 10cos * x * ins * x = 0 Multiply 7 * 10 70cinos2x2 + 70cos * x * ins * x = 0 Multiply cos * x 70cinos2x2 + 70cosx * ins * x = 0 Multiply cosx * ins 70cinos2x2 + 70cinos2x * x = 0 Multiply cinos2x * x 70cinos2x2 + 70cinos2x2 = 0 Combine like terms: 70cinos2x2 + 70cinos2x2 = 140cinos2x2 140cinos2x2 = 0 Solving 140cinos2x2 = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '140'. cinos2x2 = 0.0 Simplifying cinos2x2 = 0.0 The solution to this equation could not be determined.
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