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
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