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kaiz122
 3 years ago
Directional Derivative please
kaiz122
 3 years ago
Directional Derivative please

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0\[f(x,y)= \sin(xy)\] at \[2,\frac{\pi}{4}\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0do you mean f(x)=sinx. f(y)=siny

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0no, f(x,y)= sin(xy) Find \[d_{\theta}f(2, \frac{\pi}{4})\]

terenzreignz
 3 years ago
Best ResponseYou've already chosen the best response.0Okay, easiest way to do this is with gradients.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0oh looks like composite function.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0my answer is 0. is this right?

terenzreignz
 3 years ago
Best ResponseYou've already chosen the best response.0Sorry, was preoccupied. The directional derivative of a function in the direction of the vector v is given by this formula: \[\large \nabla f(x,y) \cdot \frac{v}{v}\]

terenzreignz
 3 years ago
Best ResponseYou've already chosen the best response.0So, first, you need to get the unit vector of \[<2, \frac{\pi}{4}>\]
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