5. Use an appropriate sum or difference identity to find the exact value of cos105° . (b) (E - J6) (e) none of these (2r- 3); ( (2*z)- (0)

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 19E
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5. Use an appropriate sum or difference identity to find the exact value of cos105°.
(2r+ z7); ()
-- J6) (d) -6)
(a)
+ V2
(e) none of these
Transcribed Image Text:5. Use an appropriate sum or difference identity to find the exact value of cos105°. (2r+ z7); () -- J6) (d) -6) (a) + V2 (e) none of these
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