#18. EXPRESS AS A SUM OR DIFFERENCE а. b. cos 6u cos (-4u) cos 2u + cos 10u sin 7t sin t cos 61 - cos 8t C. d. cos 2t sin 6t sin 81 + sin 41 2 sin 50 cos 30 sin 80 sin 26e е. f. 2 sin 70 sin 56 3 cos x sin 2x sin 3x + sin x Cos 20 – cos 120 -

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 44E
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#18. EXPRESS AS A SUM OR DIFFERENCE

#18. EXPRESS AS A SUM OR DIFFERENCE
а.
b.
cos 6u cos (-4u)
cos 2u
sin 7t sin t
cos 61 - cos 8t
+ cos 10t
C.
d.
cos 2t sin 6t
sin 81 + sin 41
2 sin 50 cos 30
sin 80 + sin 20
е.
f.
2 sin 70 sin 50
3 cos x sin 2x
cos 120
sin 3x + sin x
cos 20
-
g.
5 cos 4u cos 5u
COs 9u
COS U
Transcribed Image Text:#18. EXPRESS AS A SUM OR DIFFERENCE а. b. cos 6u cos (-4u) cos 2u sin 7t sin t cos 61 - cos 8t + cos 10t C. d. cos 2t sin 6t sin 81 + sin 41 2 sin 50 cos 30 sin 80 + sin 20 е. f. 2 sin 70 sin 50 3 cos x sin 2x cos 120 sin 3x + sin x cos 20 - g. 5 cos 4u cos 5u COs 9u COS U
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