求不定积分∫tan^6xsec^4xdx

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求不定积分∫tan^6xsec^4xdx求不定积分∫tan^6xsec^4xdx求不定积分∫tan^6xsec^4xdx∫tan^6xsec^4xdx=∫tan^6xsec^2xd(tanx)=∫ta

求不定积分∫tan^6xsec^4xdx
求不定积分∫tan^6xsec^4xdx

求不定积分∫tan^6xsec^4xdx
∫ tan^6xsec^4x dx
= ∫ tan^6xsec^2x d(tanx)
= ∫ tan^6x(1 + tan^2x) d(tanx)
= ∫ (tan^6x + tan^8x) d(tanx)
= (1/7)tan^7x + (1/9)tan^9x + C