∫ln(tan x)dx =
-1/2*i*log(tan(x))*log(1+i*tan(x))+1/2*i*log(tan(x))*log(1-i*tan(x))-1/2*i*dilog(1+i*tan(x))+1/2*i*dilog(1-i*tan(x))
太复杂了,上为matlab积分结果.