1. Show from the first principles that d/dx (cox) = - sin x
Hint: cos A- cos B = - 2 sin ((A+B)/2) sin ((A-B)/2)
limits
2013-04-11 5:39 am
回答 (1)
2013-04-11 6:58 am
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參考: pingshek
收錄日期: 2021-04-30 17:39:34
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