February 23, 2017

Homework Help: Pre-Calculus

Posted by Lucy on Saturday, August 30, 2008 at 10:12pm.

How do you work this problem. I cannot find an example in the book to illustrate how to work it.

Find the value of tan(a-b) if cos a=-3/5, sin b=5/13, 90<a<180, and 90<b<180

Thanks for any help

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