Find the directional derivative of $f ( x , y ) = 3 x ^ { 2 } + x y - y ^ { 3 }$ in the direction $\theta = \frac { \pi } { 3 }$ .

Name: Find the directional derivative of $f ( x , y ) = 3 x ^ { 2 } + x y - y ^ { 3 }$ in the direction $\theta = \frac { \pi } { 3 }$ .
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The Answer of Find the directional derivative of $f ( x , y ) = 3 x ^ { 2 } + x y - y ^ { 3 }$ in the direction $\theta = \frac { \pi } { 3 }$ .

Find the Directional Derivative Of f(x,y)=3x2+xy−y3f ( x , y ) = 3 x ^ { 2 } + x y - y ^ { 3 }f(x,y)=3x2+xy−y3

Find the Directional Derivative Of $f ( x , y ) = 3 x ^ { 2 } + x y - y ^ { 3 }$