Use the cosine of a sum and cosine of a difference identities to find cos (s+t) and cos (s-t). COS S=- 3 and sint= 5 - 1 s and t in quadrant III 5 cos (s+t)= (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.) 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). COS S=- 3 and sint= 5 - 1 s and t in quadrant III 5 cos (s+t)= (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.) 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 71E
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