Find the gradient and Laplacian of the scalar field f in two dimensions, given in the Cartesian coordinates as: f(x, y) = y sin(x), and show that the Laplacian of f is equal to - f. Find the directional derivative of f at the point P(π/6,5) in the direction of a = 3i+4j.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.6: Additional Trigonometric Graphs
Problem 77E
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Find the gradient and Laplacian of the scalar field f in two dimensions, given in the
Cartesian coordinates as:
f(x, y) = y sin(x),
and show that the Laplacian of f is equal to f.
Find the directional derivative of f at the point P(π/6,5) in the direction of a = 3i+4j.
Transcribed Image Text:Find the gradient and Laplacian of the scalar field f in two dimensions, given in the Cartesian coordinates as: f(x, y) = y sin(x), and show that the Laplacian of f is equal to f. Find the directional derivative of f at the point P(π/6,5) in the direction of a = 3i+4j.
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