Given that α is in quadrant 1 and tan(α)=2/5, and also given that β is in quadrant 2 and sin(β)=2/9, give an exact answer for the following: sin(α−β)=? cos(α−β)=? tan(α−β)=?

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Given that α is in quadrant 1 and tan(α)=2/5, and also given that β is in quadrant 2 and sin(β)=2/9, give an exact answer for the following:

sin(α−β)=?

cos(α−β)=?

tan(α−β)=?

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I plugged it in to my assignment and for cos(a-b) it says it's a -4 and not a +4. But thank you so much! I could have never gotten it without you!

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