正弦、餘弦定律及三角形面積的計數機程式問題

程式:http://hk.geocities.com/kl_cheuk/3650P/simultaneous1.htm
?→D: ?→A: ?→B: ?→C:1≧D => Goto 0:

D=2 => √(A2 + B2 - 2AB cos C→C◢

cos-1 ( (B2 + C2 - A2 ) ÷ 2BC→X◢

cos-1 ( (A2 + C2 - B2 ) ÷ 2AC→Y◢

D≠2 => πr - Y - X◢ 2-1 BC sin X◢

Lbl 0: D => sin-1 (C sin A ÷ B→C => Goto 1:

B sin C ÷ sin A: Lbl 1◢ πr - A - C◢

B sin Ans ÷ sin A◢ 2-1BAns sinC◢

DC>A => πr - C→C => Goto 1: Norm 1

問題:2-1和M-1點樣打入去