【进阶级练习题90】 8 W( x1 P' x) h4 u 0 W. o# k0 [* A0 g求: . G1 U- r A! Q! S9 N! s1. a 之长度为何? ( H, V! S0 W: ?9 V; f7 s c a. 76.7064 b. 76.7406 c. 76.7604 p, K% L2 p4 F k
2. b 弧之长度为何? 0 y0 r0 N6 D( g+ X a. 68.5273 b. 68.5372 c. 68.57232 I3 J% Q' Y( g {- J& w
3. 剖面线区域之面积为何?2 L. m* w7 O& b. u& n' k
a. 443.5255 b. 443.5525 c. 443.5552
练习题90答案: / K( N* l/ I& u1. a 之长度为何? ( e6 G4 \1 E: @$ E+ N; y. L c. 76.76048 u1 K- K8 r3 \+ X8 J$ e A
2. b 弧之长度为何?/ H9 p# q) P/ d8 o
c. 68.57231 ~/ H) C1 Z/ c, k
3. 剖面线区域之面积为何? - H- D7 D7 n$ u d a. 443.5255