点P（x，y）在曲线x=-2+cosθy=sinθ（θ为参数，θ∈R），则yx的最大值是_刷题宝

题干

点P（x，y）在曲线x=-2+cosθy=sinθ（θ为参数，θ∈R），则

y

x

的最大值是（　　）

A： $\frac{\sqrt{3}}{6}$

B： $\frac{\sqrt{3}}{3}$

C： $\frac{2 \sqrt{3}}{3}$

D：- $\frac{\sqrt{3}}{3}$

上一题下一题 0.0难度选择题更新时间:2019-06-05 08:48:38

答案(点此获取答案解析）

B

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