对反正弦函数arctgx求不定积分应该用 ( )

1个回答

D：分部积分法
=x*arctgx-∫x*1/(1+x^2)dx
=x*arctgx-1/2∫d(1+x^2)*1/(1+x^2)
=xarctgx-1/2ln(1+x^2)+C