【进阶级练习题90】: C. Y7 ^4 u! a# w
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求:# c" S8 F, I- a: q1 e1 g5 y
1. a 之长度为何? ; u7 ]. L5 e% ~0 s6 X a. 76.7064 b. 76.7406 c. 76.7604% B, X8 y) j; Q% k* H: L$ y- T1 z
2. b 弧之长度为何? " F* |( M) l+ a- c4 w a. 68.5273 b. 68.5372 c. 68.5723 ; c5 `3 l3 ~6 Y+ \6 M% s h3 H3. 剖面线区域之面积为何? ) P9 Y E: L9 [" q3 u: x7 o& w a. 443.5255 b. 443.5525 c. 443.5552
1. a 之长度为何? c. 76.7604 1 I( O! M9 J u, Y2. b 弧之长度为何? c. 68.5723 ) V- r' b. U; R! P6 M3. 剖面线区域之面积为何? a. 443.5255# @( x% s1 G" ?# B. U; [! v u
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