111. The value of cos15° cos 7 — sin 711 is 2 (a) 1/1 (b) 8 112. The value of sin 50°-sin 70° + sin 10° is (a) 0 (b) 1 C D 12 2 16 (d)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section: Chapter Questions
Problem 73RE
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111. The value of cos15° cos 7 — sin 711
is
2
(a) 1/1
(b)
8
112. The value of sin 50°-sin 70° + sin 10° is
(a) 0
(b) 1
C
D
12
2
16
(d)
Transcribed Image Text:111. The value of cos15° cos 7 — sin 711 is 2 (a) 1/1 (b) 8 112. The value of sin 50°-sin 70° + sin 10° is (a) 0 (b) 1 C D 12 2 16 (d)
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