有關arctanx的科普精選

arctanx的導數是什麼?
1/1+x²arctanx的導數是1/1+x²,設y=arctanx,則x=tany,因為arctanx′=1/tany′,且tany′=(siny/cosy)′=cosycosy-siny(-siny)/cos²y=1/cos²y,則arctanx′=cos²y=cos&sup...
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