/ b, P$ @/ [/ X6 Q2 V9 d求:. w( q4 \* f& L& Z4 B6 G7 I
1. a 之长度为何? 7 m/ k' n0 n0 \/ d3 ~ a. 76.7064 b. 76.7406 c. 76.7604, f$ A; S2 k; l0 K' d) a
2. b 弧之长度为何?, a6 ]- x2 g. [# V, F
a. 68.5273 b. 68.5372 c. 68.5723+ }2 U4 ~* l8 y5 a
3. 剖面线区域之面积为何? 9 p6 A) u# k$ d4 g1 d a. 443.5255 b. 443.5525 c. 443.5552
练习题90答案:5 J ^9 q+ p1 u8 a
1. a 之长度为何?: B; M I/ W1 F6 ?0 C
c. 76.7604 . Y4 c- r( }) ~$ j: N a2. b 弧之长度为何?2 k3 T( g0 l5 L0 P, y
c. 68.5723 1 `; C* ~& N' Q! [" t$ I ?3. 剖面线区域之面积为何? : W/ v) ?. G( ?8 z# f a. 443.5255
1. a 之长度为何? c. 76.7604 0 W* r3 ^. {; k7 S1 U2. b 弧之长度为何? c. 68.57237 D7 ^0 O7 T- }( ~% {0 f' O% Y
3. 剖面线区域之面积为何? a. 443.5255 $ a8 G' f# S* g+ Z; w / O2 F- O1 h, U