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求不定积分sin3t/sintdt
题目详情
求不定积分sin3t/sintdt
▼优质解答
答案和解析
sin3t
=sin(t+2t)
=sintcos2t+costsin2t
=sintcos2t+2sintcos^2t
sin3t/sint
=cos2t+2cos^2t
会了吧?
=sin(t+2t)
=sintcos2t+costsin2t
=sintcos2t+2sintcos^2t
sin3t/sint
=cos2t+2cos^2t
会了吧?
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