If (z=sin^{-1} frac{x^3+y^3+z^3}{x+y+z} ) then, (x frac{ z}{ x}+y fr – McqOptions

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1.	If (z=sin^{-1} frac{x^3+y^3+z^3}{x+y+z} ) then, (x frac{ z}{ x}+y frac{ z}{ y} ).
A.	2 tan(z)
B.	2 cot(z)
C.	tan(z)
D.	cot(z)
Answer» B. 2 cot(z)

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