求 cos2x ⼀ (cosx*sinx)^2的不定积分

2025-05-12 20:21:41
推荐回答(1个)
回答1:

∫cos2x / (cosx*sinx)^2 = 4∫ cos2x/sin²2x dx
=4∫ cot2x * csc2x dx
=-2∫ d csc2x
=-2csc2x +C