1/(sinx+cosx)^2的不定积分是?我怎么求出来和答案不一样,但是求导验证两个都对,我就是求不出sinx/(sinx+cosx),我求出来的是1/2( (sinx-cosx) / (sinx+cosx) ).
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![1/(sinx+cosx)^2的不定积分是?我怎么求出来和答案不一样,但是求导验证两个都对,我就是求不出sinx/(sinx+cosx),我求出来的是1/2( (sinx-cosx) / (sinx+cosx) ).](/uploads/image/z/2798050-58-0.jpg?t=1%2F%28sinx%2Bcosx%29%5E2%E7%9A%84%E4%B8%8D%E5%AE%9A%E7%A7%AF%E5%88%86%E6%98%AF%3F%E6%88%91%E6%80%8E%E4%B9%88%E6%B1%82%E5%87%BA%E6%9D%A5%E5%92%8C%E7%AD%94%E6%A1%88%E4%B8%8D%E4%B8%80%E6%A0%B7%2C%E4%BD%86%E6%98%AF%E6%B1%82%E5%AF%BC%E9%AA%8C%E8%AF%81%E4%B8%A4%E4%B8%AA%E9%83%BD%E5%AF%B9%2C%E6%88%91%E5%B0%B1%E6%98%AF%E6%B1%82%E4%B8%8D%E5%87%BAsinx%2F%EF%BC%88sinx%2Bcosx%EF%BC%89%2C%E6%88%91%E6%B1%82%E5%87%BA%E6%9D%A5%E7%9A%84%E6%98%AF1%2F2%28+%28sinx-cosx%29+%2F+%28sinx%2Bcosx%29+%29.)
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