cos -1

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.4: Values Of The Trigonometric Functions
Problem 21E
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Question

Find the exact value. Show work. 

 

V2
18) cos1
Transcribed Image Text:V2 18) cos1
19) sin-!
2.
Transcribed Image Text:19) sin-! 2.
Expert Solution
Step 1

Given:

cos-122=θ22=cos θ12=cos θθ=π4cos-122=π4

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