原帖由 jicheng 于 2007-1-4 21:43 发表 & ]6 b% p9 Z8 A: q: A
求:. C8 s" }; u) M4 R+ }
1. a 之长度为何?+ t: m* t' R; b$ D: F
a. 9.6477 b. 9.6747 c. 9.6774
3 l% s9 l1 [7 o: x) c3 g* i* L' u2. b 之长度为何?: \' j8 K# D: {
a. 14.5116 b, 14.5161 c. 14.5611
% T, w2 P% x' Z3. A弧之弧长为何?
2 ~: E7 P9 b. u& S3 Z8 y a. 27.0034 b. 27.0304 c. 27.0403 ...
/ f# C# c8 a% J0 A$ rjicheng 大哥救命啊,我怎么做这题别的都对,那两个弧长就是不对啊,我把我做的图传上来,你帮我看哈! |