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数学
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求该不定积分 ∫ tan 5x dx
人气：104 ℃ 时间：2020-04-23 06:59:38
解答
∫ tan 5x dx
=∫ sin5x/cos5x dx
=-1/5∫1/cos5x dcos5x
=-1/5ln|cos5x|+c
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