Question

sin的五次方的原函数是什么?

Answer 1

∫(sinx)^5dx
=-∫(sinx)^4dcosx
=-∫[1-(cosx)^2]^2dcosx
=-∫[(cosx)^4-2(cosx)^2+1]dcosx
=-(cosx)^5/5+2(cosx)^3/3-cosx+C
C为积分常数