求极限Lim(x→0)1/xsinx-1/xtanx
问题描述:
求极限Lim(x→0)1/xsinx-1/xtanx
答
原极限=1/xtanx(1/cosx-1)
=1/xtanx·(1-cosx)/cosx
1/x^2·0.5x^2/cosx
=0.5