Posted by Sierra on Wednesday, November 7, 2012 at 11:27am.
Give: a=alpha B=beta
csc a= 2
pi/2<a<pi
secB=3
pi/2<B<pi
1)find sin(a+B)
2)find tan(aB)
3)cos B/2
4)sin a/2

Trig  Steve, Wednesday, November 7, 2012 at 11:32am
in QII,
if csc a = 2,
sin a = 1/2
cos a = √3/2
tan a = 1/√3
if sec B = 3,
cos B = 1/3
sin B = √8/3
tan B = √8
Now it's just plug and chug, using your sumofangles and halfangle formulas. Come on back if you get stuck.
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