【进阶级练习题90】6 |- f' T. T8 x
% ], v+ A6 k1 I3 X
求: 9 P n" v! R2 g* f- Q1. a 之长度为何?, F) n# z, _' f5 b) M
a. 76.7064 b. 76.7406 c. 76.76047 [5 ^" L- s8 S# q! X4 i, s
2. b 弧之长度为何?- f& w; z, L4 J& H8 Z
a. 68.5273 b. 68.5372 c. 68.5723- k8 S. T0 x+ {& t! ~
3. 剖面线区域之面积为何?% G( \. A2 c3 N+ q
a. 443.5255 b. 443.5525 c. 443.5552
1. a 之长度为何? c. 76.7604 9 K" T0 V3 O. Q: U2. b 弧之长度为何? c. 68.5723 5 J# Q& Q; M6 [6 e3 @! F6 t3. 剖面线区域之面积为何? a. 443.5255) i" I4 Q% @7 ` h: C) M; C, I, g6 R