Identify and sketch the graphs of the following equations in R^3 1. z = cos y

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section: Chapter Questions
Problem 77RE
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Identify and sketch the graphs of the following equations in R^3

1. z = cos y 
2. 9x^2 + 4y^2 + z^2 - 36 = 0
3. x^2 − 9y^2 − z^2 = 9

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