tanx 0 例6求lim or 0 解im tanx = lim sinx 1 →>0x r cos =lim sinr lim 1×1=1 x→>0Xx→>0coSx 请问:lim lim x→0tanx 5x→>0SinX Economic-mathematics 16-10 Wednesday, February 24, 2021Economic-mathematics 16 - 10 Wednesday, February 24, 2021 “ ” 0 0 求 x x x tan lim →0 . x x x tan lim →0 ) cos sin 1 lim( 0 x x x x =  → . 1 1 1. cos 1 lim sin lim 0 0 =  =  = → x → x x x x 例6 解 ________; 0 ________; 0 sin lim tan lim = = → → x x x x x x 请问： 1 1