18. -an -an eiun -Im -im -im

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter9: Systems Of Equations And Inequalities
Section9.8: Determinants
Problem 8E
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Question
In Exercises 16-21, determine whether the given matrix is
orthogonal. If it is, find its inverse.
0 -1
1/V2 1/V2]
16.
17.
-1/V2 1/V2]
3
18.
1
3
2
5
as A sin
cos e
-sin? 0
cos? e
- cos 0 sin 0
cos e
19.
sin e
sin 0
1
1
2
2
2
2
2
20.
1
2
1
1
2
2
2
2
2
-n -n 215
Transcribed Image Text:In Exercises 16-21, determine whether the given matrix is orthogonal. If it is, find its inverse. 0 -1 1/V2 1/V2] 16. 17. -1/V2 1/V2] 3 18. 1 3 2 5 as A sin cos e -sin? 0 cos? e - cos 0 sin 0 cos e 19. sin e sin 0 1 1 2 2 2 2 2 20. 1 2 1 1 2 2 2 2 2 -n -n 215
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