lim(xâ0)(tanx-sinx)/x²Â·sinx
=lim(xâ0)(secx-1)/(x²)
=lim(xâ0)secxtanx/2x (0/0ï¼ç¨æ´å¿ è¾¾æ³åï¼
=½
=lim(xâ0)(secx-1)/(x²)
=lim(xâ0)secxtanx/2x (0/0ï¼ç¨æ´å¿ è¾¾æ³åï¼
=½
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