高数学课趕媒课件 理工大罗理罗即>> CX βx 例7Lim x→>0 SInox-SIn阝x Ax((a-B)r ele ≤m x→>02c0S (a+B)x.(a-B)x SIn 2 2 e(a-B)x Lim x→>02cos (a+B)x(a-B)x 2 2 H tt p /www.heut.eduLim x→0 e e x x x x   − sin − sin Lim x→0 2 ( ) sin 2 ( ) 2co s ( 1) ( ) x x e e x x        + − − − Lim x→0 2 ( ) 2 ( ) 2 co s ( ) x x e x x        + − − = = = 1 例7