Homework help (calculus)

Can someone please explain how to get to the answer of the following:
lim
x–pi/2
(sinx)/x
and this one
lim
x–0
((1/(3-x)) – (1/3))
________________
x
Answer #1
Read your textbook.
Answer #2
TheClassic replied: Read your textbook.
Or ask your teacher, that is what you pay them for!