Determine sin(A - B) given sin A = 4/5 in quad Il and cos B = -5/13 in quad III. %3D
Determine sin(A - B) given sin A = 4/5 in quad Il and cos B = -5/13 in quad III. %3D
Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE:
1. Give the measures of the complement and the supplement of an angle measuring 35°.
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Hello,
I am trying to undertand this question from my lecture. I am attaching an image with the excersice and solution. However, I am unsure of how to get the missing information (cosAsinB). We are using this:
sin(A-B)= sinAcosB - cosAsinB
The exercise provides Sin A and cos B, so how do I get the others?
Thank you!
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