If z = Sin-1 (x y) + Tan-1 (y x) then x z x + y z y is? – McqOptions

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1.	If z = Sin^-1 (^x _y) + Tan^-1 (^y _x) then x ^z _x + y ^z _y is?
A.	0
B.	y
C.	1 + <sup>x</sup> <sub>y</sub> Sin<sup>-1</sup> (<sup>x</sup> <sub>y</sub>)
D.	1 + <sup>y</sup> <sub>x</sub> Tan<sup>-1</sup> (<sup>y</sup> <sub>x</sub>)
Answer» B. y

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