Use the cosine of a sum and cosine of a difference identities to find cos (s+t) and cos (s - t). √2 √5 sin s= and sint = s and t in quadrant III 4 6 cos (s+t) = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)
Use the cosine of a sum and cosine of a difference identities to find cos (s+t) and cos (s - t). √2 √5 sin s= and sint = s and t in quadrant III 4 6 cos (s+t) = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.1: Verifying Trigonometric Identities
Problem 70E
Question
![Use the cosine of a sum and cosine of a difference identities to find cos (s+t) and cos (s - t).
√2
√5
sin s=
and sint =
s and t in quadrant III
4
6
cos (s+t) =
(Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3ea3400e-20ab-4705-aa5d-320dc8f61f02%2Fbd89081a-944c-4370-8795-3e57387c9eae%2Faky2qhy_processed.png&w=3840&q=75)
Transcribed Image Text:Use the cosine of a sum and cosine of a difference identities to find cos (s+t) and cos (s - t).
√2
√5
sin s=
and sint =
s and t in quadrant III
4
6
cos (s+t) =
(Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)
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