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April 20, 2014

Homework Help: trig

Posted by liyah on Thursday, December 13, 2012 at 9:09pm.

evaluate the following in exact form, where the angeles alpha and beta satisfy the conditions:
sin alpha=4/5 for pi/2 < alpha < pi
tan beta=7/24 for pie < beta < 3pi/2

answer choices
A. sin(beta+alpha) B. tan(beta-alpha) C. cos(alpha-beta)

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