lim(x趋向于0)(tanx-sinx)/x^3=?
问题描述:
lim(x趋向于0)(tanx-sinx)/x^3=?
答
0.5
答
lim(x→0)(tanx-sinx)/x^3
=lim(x→0)(sinx/cosx-sinx)/x^3
=lim(x→0)(1-cosx)/x^2
=lim(x→0)1/2x^2/x^2
=1/2