<p>I think you got the first part right. I would make it (pretend there's a as the limit approaches 0 infront of all my steps :)
(3x+sin^2x)/sinx
I would then seperate it into 2 different equations
lim 3x/sinx + lim sin^2x/sinx
3lim x/sinx (which = 1) +lim sinx
3 + 0
3
is that the correct answer?</p>