Suppose that f (x, y) = 4e%* sin y. Find the directional derivative of f(x, y) in the direction of - 1, -4) and at the point (z, y) =(4, Find exact values. No decimals

Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
Publisher:Ron Larson
Chapter6: Topics In Analytic Geometry
Section6.2: Introduction To Conics: parabolas
Problem 4ECP: Find an equation of the tangent line to the parabola y=3x2 at the point 1,3.
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Suppose that f (x, y) = 4e%* sin y. Find the directional derivative of f(x, y) in the direction of - 1, -4) and at the
point (z, y) =(4,
Find exact values. No decimals
Transcribed Image Text:Suppose that f (x, y) = 4e%* sin y. Find the directional derivative of f(x, y) in the direction of - 1, -4) and at the point (z, y) =(4, Find exact values. No decimals
Expert Solution
Step 1

To evaluate the directional derivative for the given data

Step 2

to find the gradient of  f at the point (4,pi/3)

f(x, y) 4e sin y
af af
= 4e* (3siny, cos y)
grad(f)
3/3 1
gradf(4,4e2
2 2
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