Mathematics
Senior High
⑵と⑶の途中式を教えて頂きたいです🙏😭
|1辺の長さが2の正四面体 ABCD がある。辺BC の中点を M,
ZAMD=0とし,頂点 AからMD に下ろした垂線を ANとする.
1
Cose =
2
3
AN=
4
5
6
BN =
7
8
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