Вычислите (cos 17π/3+sin 25π/6)*sin(-2,5π):cos(-35π/4).

\[= \left( \frac{1}{2} + \frac{1}{2} \right) \cdot ( - 1)\ :\left( - \frac{\sqrt{2}}{2} \right) =\]

\[= 1 \cdot ( - 1) \cdot \left( - \frac{2}{\sqrt{2}} \right) = \frac{2}{\sqrt{2}} = \sqrt{2}\]