u = sin -1 (x/y) + tan -1 (y/x). Then x\frac{\partialu}{\partialx} + y\frac{\partialu}{\partialy} is equal to

AAI ATC Junior Executive 2016 Shift 2 Paper

Question : 77 of 120

Marks: +1, -0

u = sin^-1 (x/y) + tan^-1 (y/x). Then

x\;{∂u}/{∂x} + y\;{∂u}/{∂y}

is equal to

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