lim(1-cosx)/x2 x趋向于0_数学解答

lim(1-cosx)/x2 x趋向于0

人气：496 ℃　时间：2020-03-24 20:29:28

解答

0/0型求导
limf/g=limf'/g'
lim(1-cosx)/x2 =lim(1-cosx)'/(x^2 )'
=lim(sinx)/2x
=lim(sinx)'/(2x)'
=lim(cosx/2)
=1/2