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1. |
Solution of the differential equation ( frac{dy}{dx} ) + y cot x = cos x is ______ |
A. | (y cos ,x = frac{sin^2 x}{2} + c ) |
B. | (y sin ,x = frac{sin^2 x}{2} + c ) |
C. | (y sin ,x = frac{cos^2 x}{4} + c ) |
D. | (y cos ,x = - frac{sin^2 x}{4} + c ) |
Answer» C. (y sin ,x = frac{cos^2 x}{4} + c ) | |