求不定积分∫5cosx/sin²x
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求不定积分∫5cosx/sin²x
求不定积分∫5cosx/sin²x
求不定积分∫5cosx/sin²x
嘿嘿
∫5cosx/sin²x dx
=5∫d(sinx)/(sinx)^2
=-5/sinx