what is the lim x-->(pi/2)(from the left) of [(2+secx)/(3tanx)]?

Answer 1

Hint...

Notice, sec(x) and tan(x) can be expressed in sines and cosines. 2 can also be multiplied by cosine.

When you do all that, cosines in the denominator cancels out and what's left, you can substitute pi/2 and not end up with zero in the denominator.