一道用参数方程求椭圆到原点距离最值的题我想知道是怎么化简那个三角函数,-3,对对,我想知道那个式子怎么化简
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![一道用参数方程求椭圆到原点距离最值的题我想知道是怎么化简那个三角函数,-3,对对,我想知道那个式子怎么化简](/uploads/image/z/7828277-5-7.jpg?t=%E4%B8%80%E9%81%93%E7%94%A8%E5%8F%82%E6%95%B0%E6%96%B9%E7%A8%8B%E6%B1%82%E6%A4%AD%E5%9C%86%E5%88%B0%E5%8E%9F%E7%82%B9%E8%B7%9D%E7%A6%BB%E6%9C%80%E5%80%BC%E7%9A%84%E9%A2%98%E6%88%91%E6%83%B3%E7%9F%A5%E9%81%93%E6%98%AF%E6%80%8E%E4%B9%88%E5%8C%96%E7%AE%80%E9%82%A3%E4%B8%AA%E4%B8%89%E8%A7%92%E5%87%BD%E6%95%B0%2C-3%EF%BC%8C%E5%AF%B9%E5%AF%B9%EF%BC%8C%E6%88%91%E6%83%B3%E7%9F%A5%E9%81%93%E9%82%A3%E4%B8%AA%E5%BC%8F%E5%AD%90%E6%80%8E%E4%B9%88%E5%8C%96%E7%AE%80)
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