/ / 2 \ \
| | 3 4*x 6*x | |
| |-1 + ----------------- + ------ - ----------------|*cot(x) / 2 \ / 1 \|
| | / 2\ 2 2 / 2\ | / 2 \ 3*\1 + cot (x)/*|x - -------||
| / 2 \ / 2 \ \ \1 + x /*acot (x) 1 + x \1 + x /*acot(x)/ 3*\1 + cot (x)/*cot(x) \ acot(x)/|
6*|- \1 + cot (x)/*\1 + 3*cot (x)/ + ----------------------------------------------------------- + ---------------------- + -----------------------------|
| 2 / 2\ 2 |
| / 2\ \1 + x /*acot(x) / 2\ |
\ \1 + x / *acot(x) \1 + x / *acot(x) /
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acot(x)