要求曲线的极坐标方程,然后积分计算曲线长度。
不难,但是忘记了。
不单是圆周上一点的轨迹,圆周内任意一点的轨迹方程也能求的吧。
有没有人写得出轨迹方程?
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Near 100 li.
-jinjing-
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05/26/2010 postreply
14:23:41
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It May be near 200 li. (r/R)*100+100
-jinjing-
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05/26/2010 postreply
14:39:15
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I,m wrong,007 win
-jinjing-
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05/26/2010 postreply
15:15:42
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near (400/Pi)*li, You are right.
-jinjing-
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05/26/2010 postreply
15:14:20
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Agree with your answer
-AnaZhang-
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05/26/2010 postreply
18:36:36
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Thanks, I did not know that word before
-guest007-
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06/02/2010 postreply
09:14:07