共50条信息
已知\(\alpha \in (0,\pi ),\sin \alpha +\cos \alpha =\dfrac{1}{5}\).
\((\)Ⅰ\()\) 求\(\sin \alpha -\cos \alpha \)的值;
\((\)Ⅱ\()\) 求\(\sin (2\alpha +\dfrac{\pi }{3})\)的值.
进入组卷