- 13
- 0
If the unit vector u makes an angle theta with the positive x axis then we can write u = <cos theta, sin theta>
D_{u}f(x, y) = f_{x}(x,y) cos theta + f_{y}(x,y) sin theta
What if I am dealing with a function with three variables (x, y, z)?
How can I find the directional derivative if I have been given an angle?
D_{u}f(x, y) = f_{x}(x,y) cos theta + f_{y}(x,y) sin theta
What if I am dealing with a function with three variables (x, y, z)?
How can I find the directional derivative if I have been given an angle?