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Re:没用到点积 只用到叉积。。In Reply To:没用到点积 只用到叉积。。 Posted by:allen4053040allen at 2010-07-30 13:20:33 点积中的cosx在0~π是单调的，而叉积中的sinx在0~π中非单调，显然能用cos的单调性质简化“外围”的判断。。 请教你有什么更好的方法? Followed by: Post your reply here: |
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