limx趋近于0cscx-cotx=
问题描述:
limx趋近于0cscx-cotx=
答
limx趋近于0cscx-cotx
=lim(x->0)1/sinx-cosx/sinx
=lim(x->0)(1-cosx)/sinx
=lim(x->0)(x^2/2)/x
=0