ʵ3 ָ
һʵĿ
? պĶ塢üӦ÷
ʵ
1.дһijʾͨݣݱһάһһάԶṹ͵УȻٽм㡣Ҫ㲿дɺʽʹء
̬
? ṹĶ
ԭ㷨
ԭ
̬
ͼ
P?1111(x1?x2)(y2?y1)?(x2?x3)(y3?y2)?(x3?x4)(y4?y3)?(x4?x1)(y1?y4) 2222
㷨
1n ãP??(Xi?1?Xi)(Yi?1?Yi)(i?1,2,?,ni?nʱi?1?1)
2i?1
ʵ4
һʵĿ
? պĶ塢üӦ÷
ʵ
1.ᶨ㺯
ǰᡢ߽ᡢдɺʽȻͨá
ʾ㺯˼· 1ԭ㹫ʽ
PaPbPcȨP꼴Ϊ֪ļȨƽֵ 2Ʋ
ƽ棬3֪۲???Լı12̬ǩButtonť ڶıؼValue
۴ᶨ㺯Ϊ۲Ǻ֪
꣬Ϊ꣬òķʽ㲽裻
a.֪ڽABC
b.Tan(?)Tan(?)Tan(?)Tan(A)Tan(B)Tan(C) c.PaPbPc d.XpYp
ܴ㡱ButtonťClick¼ڸ¼еú㺯Ӧıʾ
2.˹ͶӰ㺯
д˹ͶӰ뷴ƼԺȷԽвԡ
㹫ʽ
NN?232244????x?X?sinBcosBl?sinBcosB(5?t?9??4?)l??2???224???2?N?5246?720???6sinBcosB(61?58t?t)l?????y?NcosBl???Ncos3B(1?t2??2)l??3?????6???3?N5242225???cosB(5?18t?t?14??58?t)l5??120???N?a1?e2sin2Bt?tanB ??e?cosBe?a2?b2ae?? a2?b2b???
l??ǻתΪתλ
ǾLͬǰߵIJֵλΪ롣
X Ϊǰ㵽߳ȡ