ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Í¼¼×Ϊһֱ½ÇÈý½ÇÐÎÅü£¬Çã½Ç¡Ïabc=37¡ã£¬ab³¤Îª2L£¬pΪabµÄÖе㣬СÎï¿é´ÓaµãÓɾ²Ö¹ÊÍ·ÅÑØab»¬µ½bʱËÙ¶ÈÇ¡ºÃΪÁ㣬СÎï¿éÓëap¡¢pbÁ½¶ÎбÃæÖ®¼äµÄ¶¯Ä¦²ÁÒòÊý·Ö±ðΪ¦Ì1ºÍ¦Ì2¡£ÏÖ½«Åü˳ʱÕëÐýת90¡ã(ÈçͼÒÒËùʾ)£¬Ð¡Îï¿é´ÓbÓɾ²Ö¹ÊÍ·Å£¬ÒÑÖªsin37¡ã=0.6£¬c0s37¡ã=0.8£¬×î´ó¾²Ä¦²ÁÁ¦µÈÓÚ»¬¶¯Ä¦²ÁÁ¦£¬ÖØÁ¦¼ÓËÙ¶ÈΪg£¬ÔòÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ
A. ͼ¼×ÖÐСÎï¿éͨ¹ýap¡¢pb¶Î¿Ë·þĦ²ÁÁ¦Ëù×öµÄ¹¦Ö®±ÈΪl£ºl
B. ¦Ì1+¦Ì2=1.5
C. ͼÒÒÖÐСÎï¿é¿ÉÄܾ²Ö¹ÔÚb´¦
D. ͼÒÒÖÐСÎï¿é»¬µ½a´¦Ê±µÄËٶȴóСΪ
¡¾´ð°¸¡¿BD
¡¾½âÎö¡¿
AB ¡¢Í¼¼×ÖÐСÎï¿éÔÚpb¶Î×ö¼õËÙÖ±ÏßÔ˶¯£¬ÔòÓУ¬¼´ÓУ»Í¨¹ýap¶Î¿Ë·þĦ²ÁÁ¦Ëù×öµÄ¹¦£¬Ð¡Îï¿éͨ¹ýpb¶Î¿Ë·þĦ²ÁÁ¦Ëù×öµÄ¹¦£¬Ð¡Îï¿éͨ¹ýap¡¢pb¶Î¿Ë·þĦ²ÁÁ¦Ëù×öµÄ¹¦Ö®±ÈΪ£»Ð¡Îï¿é´Óaµã»¬µ½b¹ý³Ì£¬¸ù¾Ý¶¯Äܶ¨Àí¿ÉµÃ£¬»¯¼òΪ£¬¹ÊBÕýÈ·£¬A´íÎó£»
C¡¢Í¼ÒÒÖÐÔÚb´¦ÔòÓУ¬Ð¡Îï¿é²»¿ÉÄܾ²Ö¹ÔÚb´¦£¬¹ÊC´íÎó£»
D¡¢Í¼ÒÒÖÐÉèСÎï¿é»¬µ½a´¦Ê±µÄËٶȴóСΪ£¬¸ù¾Ý¶¯Äܶ¨Àí¿ÉµÃ£¬½âµÃ£¬¹ÊDÕýÈ·£»
¹ÊÑ¡BD¡£