令t=arcsinx,则x=sint,dx=cost dt
∫(arcsinx)²dx
=∫ t²·cost dt
=t²·sint-∫ 2t·sint dt
=t²·sint+∫ 2t·d(cost)
=t²·sint+2tcost-∫ 2cost dt
=t²·sint+2tcost-2sint+C
=x·arcsin²x+2arcsinx·√(1-x²)-2x+C
求高手∫(arcsinx)²dx=?
令t=arcsinx,则x=sint,dx=cost dt
∫(arcsinx)²dx
=∫ t²·cost dt
=t²·sint-∫ 2t·sint dt
=t²·sint+∫ 2t·d(cost)
=t²·sint+2tcost-∫ 2cost dt
=t²·sint+2tcost-2sint+C
=x·arcsin²x+2arcsinx·√(1-x²)-2x+C