Assume that sin (x) = cos (x - y) = 3 5' sin (y) 4 == where 9' EN < x < π and 3π < y < 2n. Calculate cos (x - y). (Give an exact answer. Use symbolic notation and fractions where needed.)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.2: Trigonometric Equations
Problem 106E
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Assume that sin (x) =
3
5'
cos (x - y) =
sin (y):
4
where
T
3π
< x < π and <y< 2n.
2
2
Calculate cos (x - y).
(Give an exact answer. Use symbolic notation and fractions where needed.)
Transcribed Image Text:Assume that sin (x) = 3 5' cos (x - y) = sin (y): 4 where T 3π < x < π and <y< 2n. 2 2 Calculate cos (x - y). (Give an exact answer. Use symbolic notation and fractions where needed.)
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