/ 2 2 2 2 \
| sin (x) 3*cos (x) 3*cos (x)*sin (x)|
|1 - ----------- + ----------- - -----------------|*sin(x)
| 2 2 2 |
| 1 - cos (x) 1 - cos (x) / 2 \ |
\ \1 - cos (x)/ /
----------------------------------------------------------
_____________
/ 2
\/ 1 - cos (x)
$$\frac{\left(1 - \frac{\sin^{2}{\left(x \right)}}{1 - \cos^{2}{\left(x \right)}} + \frac{3 \cos^{2}{\left(x \right)}}{1 - \cos^{2}{\left(x \right)}} - \frac{3 \sin^{2}{\left(x \right)} \cos^{2}{\left(x \right)}}{\left(1 - \cos^{2}{\left(x \right)}\right)^{2}}\right) \sin{\left(x \right)}}{\sqrt{1 - \cos^{2}{\left(x \right)}}}$$