For the following exercises, find the requested information. Given that sin a =  2/3 and cos b = −1/4, with a and b both in the interval [π/2 , π), find sin(a + b) and cos(a − b).

Chapter 7, 7.2 Exercises #20

For the following exercises, find the requested information. 

Given that sin a =  2/3 and cos b = −1/4, with a and b both in the interval [π/2 , π), find sin(a + b) and cos(a − b).


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Related Book For answer-question

Precalculus

1st Edition

Authors: Jay Abramson

ISBN: 9781938168345