asin(3*x)
d --(asin(3*x)) dx
3 ------------- __________ / 2 \/ 1 - 9*x
27*x
-------------
3/2
/ 2\
\1 - 9*x /
/ 2 \
| 27*x |
27*|1 + --------|
| 2|
\ 1 - 9*x /
-----------------
3/2
/ 2\
\1 - 9*x /