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# Finding Directional Derivatives

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Consider the function f(x,y,z)= e^xy cos(x+z). What is the directional derivative for f at the point P(0, -pie/6, pie/3) in the direction u parallel to i - j + 2k

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Consider the function f(x, y, z) = exycos(x + z). What is the directional derivative for f at the point
P(0, - /6,  /3) in the direction u parallel to i - j + 2k?
=
Unit vector
The directional derivative for f at the point in the direction of u =

At x = 0, y = -/6, z = 
Directional derivative =

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

© BrainMass Inc. brainmass.com October 7, 2022, 6:08 pm ad1c9bdddf>
https://brainmass.com/math/derivatives/finding-directional-derivatives-180222