MD5:
020d82877d2ab3bb6203732e1ef7d1f0
Link:
http://aachan.sageru.org/browse.pl?md5=020d82877d2ab3bb6203732e1ef7d1f0
Tags:
tanasinn
|\
tanasinn→ |∴\←?
|∴∵\
~ ̄ ̄ ̄
↑
tanasinn
|\
tanasinn→ |∴\←tanisige
|∴∵\
~ ̄ ̄ ̄
↑
tanasinn
A
|\
α→ |∴\ ∠ABC=θ
|∴∵\
B~ ̄ ̄ ̄ C
↑
β
S = 1/2・α・β・tanasinθ= tanasin.