在
中,角
、
、
的对边分别为
、
,
,且
,
则角
的大小为________ ;若
边上中线
的长为
,则
的面积为________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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20-21高二·浙江·单元测试 查看更多[1]
(已下线)第01章解三角形(B卷提升篇)-2020-2021学年高二数学必修五同步单元AB卷(人教A版,浙江专用)
更新时间:2020-08-30 20:32:51
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【推荐2】设
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【推荐3】托勒密是古希腊天文学家、地理学家、数学家,托勒密定理就是以其名字命名的重要定理,该定理原文:圆的内接四边形中,两对角线所包矩形的面积等于一组对边所包矩形的面积与另一组对边所包矩形的面积之和.其意思为:圆的内接凸四边形两组对边乘积的和等于两条对角线的乘积.从这个定理可以推出正弦、余弦的和差公式及一系列的三角恒等式,托勒密定理实质上是关于共圆性的基本性质.已知四边形
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【推荐1】如图,在矩形ABCD中,点E在边AD上,点F在边BC上,
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【推荐2】已知球面上有
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