【进阶级练习题90】$ M1 w3 y( x) h6 k6 Z/ L
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求: # e% H( O8 j% m# [" U1 `4 @0 {1. a 之长度为何?1 o1 C& z+ j# E
a. 76.7064 b. 76.7406 c. 76.76045 |, j: T* l- h$ m, x1 t% ]
2. b 弧之长度为何?9 L; j$ B+ V q/ G- }! q
a. 68.5273 b. 68.5372 c. 68.5723 2 N& w% C) j0 C5 `4 ^3. 剖面线区域之面积为何?) E6 K* v$ v$ l+ m. f
a. 443.5255 b. 443.5525 c. 443.5552
练习题90答案:: C6 p5 n, C- g1 y/ [
1. a 之长度为何? ) [3 y( @0 B* G c. 76.7604 * f1 t( ?! v$ m; t2. b 弧之长度为何? 2 F" l2 N2 n6 D% E1 } c. 68.57239 l. D( i" l Y. K
3. 剖面线区域之面积为何?- r8 z U$ r% H3 ?
a. 443.5255