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Let f(x,y,z)=xysinzyzsinxf ( x , y , z ) = x y \sin z - y z \sin x

Question 18

Multiple Choice

Let f(x,y,z) =xysinzyzsinxf ( x , y , z ) = x y \sin z - y z \sin x . Then fz(x,y,z) f _ { z } ( x , y , z ) is


A) xycosz+ysinxx y \cos z + y \sin x
B) xycoszysinxx y \cos z - y \sin x
C) xycoszysinx- x y \cos z - y \sin x
D) xycosz+ysinx- x y \cos z + y \sin x
E) xysinzycosxx y \sin z - y \cos x

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