1. a and ß are acute angles in quadrant 1, with sin a =- and cos B = Determine the exact 5 25 value of cos(a -B). Show all of your work.

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
Question
7
1. a and B are acute angles in quadrant 1, with sin a = - and cos B =-
. Determine the exact
25
value of cos (a –-B). Show all of your work.
Transcribed Image Text:7 1. a and B are acute angles in quadrant 1, with sin a = - and cos B =- . Determine the exact 25 value of cos (a –-B). Show all of your work.
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