Forgot password
 Register account
View 170|Reply 1

[几何] 已知四面体三个面面积和两两所夹的二面角,求体积

[Copy link]

83

Threads

49

Posts

0

Reputation

Show all posts

lihpb posted 2023-12-30 11:43 |Read mode
证明这个公式

QQ图片20231230112747.png

之前帖子的顶点角写错了,是二面角,我看成了线线角

70

Threads

442

Posts

19

Reputation

Show all posts

hejoseph posted 2024-1-5 16:41
跟这里发的方法差不多啊,
forum.php?mod=viewthread&tid=11764
三面角第一余弦定理换成第二余弦定理就得了。

Quick Reply

Advanced Mode
B Color Image Link Quote Code Smilies
You have to log in before you can reply Login | Register account

$\LaTeX$ formula tutorial

Mobile version

2025-7-15 14:16 GMT+8

Powered by Discuz!

Processed in 0.013790 seconds, 25 queries