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bsintcost的导数
"bsintcost的导数"...bsintcost的导数
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s=asin(wt+φ)求导
"s=asin(wt+φ)求导"...s=asin(wt+φ)求导
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asint+bcost
"asint+bcost"...asint+bcost
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bcosx的导数是多少
"bcosx的导数是多少"...bcosx的导数是多少