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

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
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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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