Solution of the differential equation ( frac{dy}{dx} -y ,tan x = frac{sin x cos^2 x}{y^2} ) is ______

• A. (y ,cos^2 x = frac{-cos^4 xsin^2 x}{2} + c )
• B. (y^2 cos^2 x = frac{sin^6 x}{2} + c )
• C. (y^3 cos^3 x = frac{-cos^6 x}{2} + c )
• D. (y^4 cos^5 x = frac{sinx cos u2061x}{2} + c )