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September 4, 2015

Homework Help: trig

Posted by jared on Monday, November 7, 2011 at 12:37am.

given that sin(a+b)= 56/65, cos(a+b)-33/65, cos(b)=-12/13 and pi/2<b<pi
Find:
sin(a)?
cos(a)?
tan(a)?

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