西安毛子科技大学极限存在准则，两个重要极限XIDIANUNIVERSITY思考题sinxsinx2O=limlimlimsinxX-00X-00x+-00x1sin112Xlim x sinlim xsin lim=1.二=一X>00xxX-00X->00x10lim x sin02x->0x极限存在准则，两个重要极限 sin lim 1 x x → x = ? 0 1 lim sin 0 x x → x = ? 1 lim sin x x → x = ? × sin lim x x → x = √ 1 lim sin → = x x x sin li 1 1 mx→ x x 1 lim sin x x → x        = 0. 思考题 =1. 