求高数问题详细过程指导
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令x=atant,郑空则dx=asec^2tdt
原早丛埋式=∫a^2tan^2t/asect*asec^2tdt
=a^2*∫tan^2tsectdt
=a^2*∫tantd(sect)
=a^2*tantsect-a^2*∫sec^3tdt
=a^2*tantsect-a^2*∫sect(tan^2t+1)dt
=a^2*tantsect-a^2*∫tan^2tsectdt-a^2*∫sectdt
=a^2*tantsect-a^2*∫tan^2tsectdt-a^2*ln|sect+tant|
所以a^2*∫tan^2tsectdt=(a^2/2)*[tantsect-ln|sect+tant|]+C
原式=(x/2)*√(a^2+x^2)-(a^2/2)*ln|x+√(a^2+x^2)|+C,其中C是陆蚂任意常数
原早丛埋式=∫a^2tan^2t/asect*asec^2tdt
=a^2*∫tan^2tsectdt
=a^2*∫tantd(sect)
=a^2*tantsect-a^2*∫sec^3tdt
=a^2*tantsect-a^2*∫sect(tan^2t+1)dt
=a^2*tantsect-a^2*∫tan^2tsectdt-a^2*∫sectdt
=a^2*tantsect-a^2*∫tan^2tsectdt-a^2*ln|sect+tant|
所以a^2*∫tan^2tsectdt=(a^2/2)*[tantsect-ln|sect+tant|]+C
原式=(x/2)*√(a^2+x^2)-(a^2/2)*ln|x+√(a^2+x^2)|+C,其中C是陆蚂任意常数
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