Задание
Упростите и найдите пару:
| \(\sin \left(\dfrac{\pi}{2}+\alpha\right)\) | \(-\cos \alpha\) |
| \(\cos (\pi- \alpha)\) | \(-\sin \alpha\) |
| \(\cos \left(\dfrac{3\pi}{2}+\alpha\right)\,\) | \(\sin \alpha\) |
| \(\sin (\pi+ \alpha)\) | \(\cos \alpha\) |