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已知对任意平面向量=(x,y),把绕其起点沿逆时针方向旋转θ角得到向量=(xco...
已知对任意平面向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183557596402294/SYS201310241835575964022013_ST/0.png)
=(x,y),把
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183557596402294/SYS201310241835575964022013_ST/1.png)
绕其起点沿逆时针方向旋转θ角得到向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183557596402294/SYS201310241835575964022013_ST/2.png)
=(xcosθ-ysinθ,xsinθ+ycosθ),叫做把点B绕点A逆时针方向旋转θ角得到点P.设平面内曲线C上的每一点绕原点沿逆时针方向旋转
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183557596402294/SYS201310241835575964022013_ST/3.png)
后得到点的轨迹是曲线x
2-y
2=2,则原来曲线C的方程是
.
考点分析:
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