共50条信息
点\(P\)从\(\left( \left. 1,0 \right. \right)\)出发,沿单位圆逆时针方向运动\( \dfrac{4π}{3}\)弧长到达\(Q\) 点,则\(Q\)点的坐标为\((\) \()\)
若角\(\alpha \)的终边经过点\(P(1,-2)\),则\(\tan \alpha =\)____.
已知角\(θ\)的始边与轴非负半轴重合,终边在直线\(y= \dfrac{1}{2}x \)上,则\(\cos 2θ=\) \((\) \()\)
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