2564| 7
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求正弦曲线y=R*sin(a),当从a1点移到a2点在y方向走过的路程 |
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发表于 2011-5-16 22:58
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YES!
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发表于 2011-5-17 09:31
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你把问题搞复杂了。就是求dy绝对值的积分
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发表于 2011-11-27 11:52
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