Trig
posted by Don .
If tanx = 2/3 tany = 1/2
then tan(xy) = ??
a.7/4
b.7/6
c.1/8
d.8/6
which answer is correct ??

tan(ab) = [ tan a  tan b)/(1 + tan a tan b)
You better learn those trig identities. 
The answer is 1/8
Is that correct Damon ? 
Yes, correct

(a) 7/4