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Simplifying cos(45 + x) + cos(45 + -1x) = 0 (45 * cos + x * cos) + cos(45 + -1x) = 0 (45cos + cosx) + cos(45 + -1x) = 0 45cos + cosx + (45 * cos + -1x * cos) = 0 45cos + cosx + (45cos + -1cosx) = 0 Reorder the terms: 45cos + 45cos + cosx + -1cosx = 0 Combine like terms: 45cos + 45cos = 90cos 90cos + cosx + -1cosx = 0 Combine like terms: cosx + -1cosx = 0 90cos + 0 = 0 90cos = 0 Solving 90cos = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '90'. cos = 0.0 Simplifying cos = 0.0 The solution to this equation could not be determined.
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