进阶级练习题74$ ]# }9 U7 x* u# @, w! W
求: y6 G/ F" {( c' v
1. AD 之距离为何?b. 65.0780 4 q- j+ H F8 I: T3 @9 Y& Z3 |& i, R; b/ j4 O) b
2. ∠ABC 之角度值为何?c. 84.912°! A. x* d; L- y; f5 ~- b X
+ g: F* _& @3 [
3. a 弧之长度为何?b. 37.4818' N' U3 ?( B# i2 {. o! d
1. AD 之距离为何? 2 j5 K# v+ n7 _0 z9 f b. 65.0780 ! n) F' v C# f4 |2. ∠ABC 之角度值为何?, X3 S3 v+ g1 J3 q' a
c. 84.912°: ?6 e& Z# J1 g# y! T1 \
3. a 弧之长度为何?# S* [9 c- x$ o9 v( L
b. 37.4818 0 H; `2 L2 P& [4. 此图包围的面积为何?7 l. x t; O: \+ o
c. 3397.8710