【进阶级练习题90】 ) K4 d( K) R2 h) e% Z, j# M' H# S$ n' v4 a) s: y( m2 b# e
求: ; M M$ g( V) C9 K$ \5 e1. a 之长度为何?9 r! s- r0 Y! b
a. 76.7064 b. 76.7406 c. 76.7604 5 ~0 ~* E' s; `2. b 弧之长度为何? + I" E, M* L2 w8 f# k a. 68.5273 b. 68.5372 c. 68.5723 5 q& B% Z* h/ D% [3 |) c4 k7 z3. 剖面线区域之面积为何? ( D" r# T. R& F Z: W( ^: Q a. 443.5255 b. 443.5525 c. 443.5552
1. a 之长度为何? c. 76.7604 ; Y* r! G! O' @8 J" @+ W2. b 弧之长度为何? c. 68.5723) J6 d9 f+ n& ^7 B) L
3. 剖面线区域之面积为何? a. 443.5255- Q; l) a8 ~0 g* l8 }/ I
0 T" n3 U5 u' @' J! D+ K+ w z