u = sin-1 (x/y) + tan-1 (y/x). Then \(x\frac{{\partial u}}{{\partial x – McqOptions

MCQOPTIONS

1.	u = sin-1 (x/y) + tan-1 (y/x). Then \(x\frac{{\partial u}}{{\partial x}} + y\frac{{\partial u}}{{\partial y}}\) is equal to
A.	u/2
B.	2u
C.	Zero
D.	u
Answer» D. u

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