∫sin^3(x) dx 求不定积分最主要的是,dx--->d(cosx)[或者其他]后,前面的怎么相应变化呢,∫sin^2(x)sin(x)dx = -∫sin^2(x)dcosx ,,∫sin^2(x)照抄,,,那么sin(x)怎么就成了个 -号呢?
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![∫sin^3(x) dx 求不定积分最主要的是,dx--->d(cosx)[或者其他]后,前面的怎么相应变化呢,∫sin^2(x)sin(x)dx = -∫sin^2(x)dcosx ,,∫sin^2(x)照抄,,,那么sin(x)怎么就成了个 -号呢?](/uploads/image/z/1138734-54-4.jpg?t=%E2%88%ABsin%5E3%28x%29+dx+%E6%B1%82%E4%B8%8D%E5%AE%9A%E7%A7%AF%E5%88%86%E6%9C%80%E4%B8%BB%E8%A6%81%E7%9A%84%E6%98%AF%2Cdx---%3Ed%28cosx%29%5B%E6%88%96%E8%80%85%E5%85%B6%E4%BB%96%5D%E5%90%8E%2C%E5%89%8D%E9%9D%A2%E7%9A%84%E6%80%8E%E4%B9%88%E7%9B%B8%E5%BA%94%E5%8F%98%E5%8C%96%E5%91%A2%2C%E2%88%ABsin%5E2%28x%29sin%28x%29dx+%3D+-%E2%88%ABsin%5E2%28x%29dcosx+%2C%2C%E2%88%ABsin%5E2%28x%29%E7%85%A7%E6%8A%84%2C%2C%2C%E9%82%A3%E4%B9%88sin%28x%29%E6%80%8E%E4%B9%88%E5%B0%B1%E6%88%90%E4%BA%86%E4%B8%AA+-%E5%8F%B7%E5%91%A2%3F)
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