Question 1031123
 need help figuring out the exact value for this expression.
sen(a)= 3/5,&#960;/2<a<&#960; AND cos(B)= 20/29,0 <B<&#960;/2,sin (a-B)= ????
------
This is what the posted version of you problem looks like.
You need to repost it.
Cheers,
Stan H.
------------