Trigonometry (11th Edition)
Trigonometry (11th Edition)
11th Edition
ISBN: 9780134217437
Author: Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher: PEARSON
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No. 12-14
Use the sum and difference identities to evaluate the following:
11n
11n
(8) sin 15°
(9) cot 75°
(10) sec
6
(11) cos
12
24
cot A > 0 ; cos B =
25'
Given: cos A =
tan B > 0
Find: (12) sin(A±B)
(13) cos(A ± B)
(14) tan(A ± B)
Find the exact value using the half-angle identities.
1050
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Transcribed Image Text:Use the sum and difference identities to evaluate the following: 11n 11n (8) sin 15° (9) cot 75° (10) sec 6 (11) cos 12 24 cot A > 0 ; cos B = 25' Given: cos A = tan B > 0 Find: (12) sin(A±B) (13) cos(A ± B) (14) tan(A ± B) Find the exact value using the half-angle identities. 1050
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