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Find f\nabla f For f(x,y)=tan(x)yf ( x , y ) = \frac { \tan ( x ) } { y }

Question 28

Multiple Choice

Find f\nabla f for f(x,y) =tan(x) yf ( x , y ) = \frac { \tan ( x ) } { y } .


A) <tan(x) y2,sec2(x) y2>< - \frac { \tan ( x ) } { y ^ { 2 } } , \frac { \sec ^ { 2 } ( x ) } { y ^ { 2 } } >
B) <tan(x) y,tan(x) y2>< \frac { \tan ( x ) } { y } , - \frac { \tan ( x ) } { y ^ { 2 } } >
C) <sec2(x) y,tan(x) y2>< \frac { \sec ^ { 2 } ( x ) } { y } , - \frac { \tan ( x ) } { y ^ { 2 } } >
D) <sec2(x) y2,tan(x) y>< \frac { \sec ^ { 2 } ( x ) } { y ^ { 2 } } , \frac { \tan ( x ) } { y } >

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