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