/ _________\ asin\\/ 1 - 3*x /
asin(sqrt(1 - 3*x))
___
-\/ 3
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___ _________
2*\/ x *\/ 1 - 3*x
___ /1 3 \
\/ 3 *|- - -------|
\x 1 - 3*x/
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___ _________
4*\/ x *\/ 1 - 3*x
___ / 1 9 2 \
3*\/ 3 *|- -- - ---------- + -----------|
| 2 2 x*(1 - 3*x)|
\ x (1 - 3*x) /
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___ _________
8*\/ x *\/ 1 - 3*x