Find and sketch the domain for the function. cos (xy) f(x,y) = 2 x² + y²-81

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section: Chapter Questions
Problem 49RE
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ns)
Find and sketch the domain for the function.
f(x,y)=
cos (xy)
x² + y²-81
Transcribed Image Text:ns) Find and sketch the domain for the function. f(x,y)= cos (xy) x² + y²-81
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