用凑微分法解答tan(x+3)/cos^2(x+3) dxtan(x+3)/[cos(x+3)]^2 dx
问题描述:
用凑微分法解答tan(x+3)/cos^2(x+3) dx
tan(x+3)/[cos(x+3)]^2 dx
答
用凑微分法解答tan(x+3)/cos^2(x+3) dx
tan(x+3)/[cos(x+3)]^2 dx