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Simplifying cos(3y + 2y) = cos(3y + -2y) Combine like terms: 3y + 2y = 5y cos(5y) = cos(3y + -2y) Remove parenthesis around (5y) cos * 5y = cos(3y + -2y) Reorder the terms for easier multiplication: 5cos * y = cos(3y + -2y) Multiply cos * y 5cosy = cos(3y + -2y) Combine like terms: 3y + -2y = 1y 5cosy = cos(1y) Remove parenthesis around (1y) 5cosy = cos * 1y Reorder the terms for easier multiplication: 5cosy = 1cos * y Multiply cos * y 5cosy = 1cosy Solving 5cosy = 1cosy Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1cosy' to each side of the equation. 5cosy + -1cosy = 1cosy + -1cosy Combine like terms: 5cosy + -1cosy = 4cosy 4cosy = 1cosy + -1cosy Combine like terms: 1cosy + -1cosy = 0 4cosy = 0 Divide each side by '4'. cosy = 0 Simplifying cosy = 0 The solution to this equation could not be determined.
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