По формуле
[m](u^{-\frac{1}{2}})`=-\frac{1}{2}\cdot u^{-\frac{1}{2}-1}\cdot u`[/m]
[m]y`=(-\frac{1}{2}\cdot (tg\frac{x}{2}+tg\frac{π}{4})^{-\frac{3}{2}}\cdot (tg(x/2)+tg(π/4))`=[/m]
[m]=-\frac{\frac{1}{cos^2\frac{x}{2}}\cdot (\frac{x}{2})`}{2\sqrt{(tg\frac{x}{2}+tg\frac{π}{4})^3}}=[/m]
[m]=-\frac{\frac{1}{cos^2\frac{x}{2}}\cdot \frac{1}{2}}{2\sqrt{(tg\frac{x}{2}+tg\frac{π}{4})^3}}=[/m]
[m]=-\frac{1}{4cos^2\frac{x}{2}\cdot\sqrt{(tg\frac{x}{2}+tg\frac{π}{4})^3}}[/m]