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If $u= \sin^{-1} \bigg(\large\frac{x}{y}\bigg)$$+\tan^{-1} \bigg(\large\frac{y}{x}\bigg)$, then the value of $x \large\frac{\partial u}{\partial x}$$+y \large\frac{\partial u}{\partial y}$ is :

\[\begin {array} {1 1} (a)\;0 & \quad (b)\;1 \\ (c)\;2 & \quad (d)\;none\;of\;these \end {array}\]

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1 Answer

(a) 0
answered Feb 27, 2014 by meena.p
 

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