1.

The solution of the differential equation \[\frac{dy}{dx}+2y\cot x=3{{x}^{2}}\text{cose}{{\text{c}}^{2}}x\]is

A.                 \[y{{\sin }^{2}}x={{x}^{3}}+c\]
B.                 \[y\sin x=c\]
C.                 \[y\cos {{x}^{2}}=c\]       
D.                 \[y\sin {{x}^{2}}=c\]
Answer» B.                 \[y\sin x=c\]


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