¡°·¢²ÆÁË£¡¡±
óÐÈÚ¾ü¾üÓªÖ®ÖУ¬Ëæ×žÖÊÆ±»Áõ¾üÕÆ¿ØÏÂÀ´£¬Áõ±¸µÄÖ÷±¡³Â¶°Ò²ÊǽøÈëÁËóÐÈڵĴóÓª¡£ÀúÊ·ÉÏÏôºÎÔÚ´òÈëÏÌÑôÖ®ºó£¬Ê×ÏÈÈ¥ÇØµÛ¹úµÄØ©Ïฮ£¬°ÑÀïÃæ¹ØÓð¹ú¼ÒµÄ»§¼®¡¢·¨ÁîµÈ¸÷ÖÖµµ°¸Ò»Ò»½øÐÐÇå²éÊղء£ÏÖÔڳ¶°cosµÄ¾ÍÊÇÏôºÎ£¬ÏȰÑóÐÈڵĸ÷ÖÖÎï×ʺÍÕËÄ¿ÕÆ¿ØÏÂÀ´¡£
ÆäʵÔÚcosÏôºÎ֮ǰ£¬³Â¶°ÒѾcos¹ýÒ»°ÑÕÅÁ¼ÁË¡£ÈùØÓðºÍ³Âµ½´ø¶Ó£¬Í¨¹ý¼Ù°ç³É·ð½Ìͽ»ìÈëóÐÈÚ´óÓªÖеļƲ߱ãÊdz¶°Ìá³öÀ´µÄ¡£
²»¹ýµ±Ê±³Â¶°¿ÉûÄÜÏëµ½óÐÈÚ»áÈ¥½Ó¼û×Ô¼ºµÄ·ðÓÑ£¬Ò²Ã»Ö¸Íû¹ØÓðÖ±½ÓÄܹ»ÇÜɱóÐÈÚ¡£³Â¶°ÆÚÍûµÃ¾ÍÊǹØÓðÄܹ»´øÈËÔÚóÐÈÚ¾üÓªÀïÓ¦ÍâºÏ£¬ÔÚÁõ±¸¹¥´òóÐÈÚ´óӪ֮ʱ£¬Äܹ»ÔÚ´óÓªÖ®ÖÐÖÆÔì»ìÂÒ£¬ÎªÖ÷Á¦´´ÔìÌõ¼þ¡£ÖÁÓÚÀ´Ò»³¡Õë¶ÔóÐÈÚµÄÕ¶Ê×Ðж¯£¬ÉõÖÁÓÚ¹ØÓð±¾ÈËÒ²²»ÊǺܱ§ÓÐÆÚÍûµÄ¡£
Ö»ÊÇóÐÈڵĵ¹Ã¹£¬»¹ÓÐÕ½¶·Á¦µÄÀ¿è£¬ÓÐЩ³¬ºõÁ˳¶°µÄÒâÁÏ¡£±ÈÆðµ±¾üÍ·À´£¬óÐÈÚÃ÷ÏÔ¸ü¼ÓÊʺϵ±Ò»Ãû×Ú½ÌÍ·Ä¿£¬ËûµÄ´óÓª²¼Öõ÷dz£ËÉÉ¢£¬¿ÉÒÔ˵ÊÇÆÆÕÀ°Ù³ö£¬ÉõÖÁÓÐЩµØ·½¶¼ÔÊÐíÂòÂôÈ˽ø³ö¡£¿ÉÄÜ³ÐÆ½Èվã¬Ê¿±øµÄ¾¯ÌèÐÔÒ²²»¸ß£¬Áõ±¸¾ü¶¼Ãþµ½´óÓª¸úǰÁË£¬ËûÃDzŷ¢ÏÖµÐÏ®£¬±»´òÁËÒ»¸ö´ëÊÖ²»¼°¡£
½á¹ûÁõ±¸¾üµÄÏÈ·æÒ»³å»÷£¬Ö±½Ó¾Í°ÑóÐÈÚ´óÓªµÄկßøÄÃÁËÏÂÀ´¡£Óë´Ëͬʱ£¬óÐÈÚÕýÔÚ½Ó¼û¹ØÓ𡢳µ½Ò»ÐÐÈË£¬ËÍÉÏÃŵÄËûÖ±½Ó±»¾ÍµØÕ¶Êס£½ô½Ó׏ØÓðÄÃ×ÅóÐÈÚÊ×¼¶ÔÚ´óÓªÖ®Öм²³ÛÁËÒ»Õ󣬴ӶøÒýÆðÁËóÐÈÚ¾üµÄ±ÀÀ£¡£
µ±Ò»Çж¼°²¶¨ÏÂÀ´Ö®ºó£¬Áõ±¸°´ÕÕÌÕÇ«µÄÒªÇ󣬽«óÐÈÚµÄÊ×¼¶ËÍÍùÏÂÚü£¬³Â¶°Ôò¿ªÊ¼ÇåµãÆðóÐÈÚʣϵÄÇ®Á¸À´¡£ËäÈ»óÐÈÚÕâЩÄêÔÚ·ðÊÂÉÏ»¨ÁË´ó°ÑµÄÇ®Á¸£¬µ«Ëû½ØÁôµÄÈý¿¤¸³Ë°Ò²²»ÉÙ£¬¾¹È»»¹ÓнáÓ࣬Õⲿ·Ö±ãÒѾÈÃÇîÅÂÁ˵ij¶°¼ûÇ®ÑÛ¿ªÁË¡£
²»¹ýóÐÈÚÒ²²»ÐèÒª¾õµÃÔ©£¬ÕâÒ»´ÎΪÁ˶Ը¶Ëû£¬Áõ±¸¼¯ÍÅ¿ÉÒÔ˵ÊÇÇã³²¶ø³ö£¬´óÃû¶¦¶¦µÄÁõ¹ØÕÅÕÔËÄÈË×éÈ«²¿µÇ³¡£¬»¹Óг¶°Õâôһ¸ö´©Ô½Õߣ¬Ò²¾Í±È²ÜÀϰåÔÚººÖÐʱÓöµ½µÄÁõ±¸È«Ã÷ÐǼ¯ÍÅÈõһЩ¡£
¾ÍÔڳ¶°ÔÚÄÇÀïÇåµãÇ®Á¸µÄʱºò£¬Áõ¹ØÕÅÕÔµÈÈËҲûÓÐÏÐ×Å¡£óÐÈÚ¾üÕ½¶·Á¦ËäÈ»²»ÐУ¬µ«ÈËÊýÈ´²»ÉÙ£¬È«²¿²¿ÇúÄܹ»ÓнüÍòÈË£¬ÕâÈËÊý±ÈÁõ±¸µÄÊÖÏ»¹Òª¶à¡£
³Ã×ÅóÐÈÚûÅÜ֮ǰÏûÃðËû£¬²»µ«±ÜÃâÁËóÐÈÚ»öº¦¹ãÁ꣬»¹Ö±½ÓÈÃÁõ±¸³ÔÁË´ó´óµÄÒ»¿Ú·ÊÈ⣬²¹³äÁËÇ®Á¸»¹ÓÐÈ˿ڣ¬³Â¶°¶¼¾õµÃ×Ô¼ºÕâ¸ö¼Æ»®·Ç³£°ô¡£
¡°óÐÈÚÕâ±ß¹²Óв¿Çú¾Åǧ¾Å°ÙËÄÊ®ÈýÈË£¬ÆäÖÐÓÐËÄǧÎå°Ù¶þÊ®ÁùÈËÊÇÏÂÚü±¾µØÈË£¬ÊÇÔÚÏÂÚü±à»§ÆëÃñµÄ£¬Ê£ÏµÄÓаËÊ®ÈýÈË£¬ÊÇóÐÈڵĵ¤ÑôÀÏÏ磬ʣϵÄÈ«¶¼ÊǸ÷µØ±»óÐÈÚÊÕ£¹ýÀ´µÄÁ÷Ãñ£¡²»¹ýÕâ¾Åǧ²¿Çú£¬¾ø´ó¶àÊý¶¼ÊÇ·ð½ÌÐÅͽ£¡¡±
¾Íµ±³Â¶°ÔÚÄÇÀïÇåÀíÇ®Á¸µÄʱºò£¬Áõ±¸ÄDZßÒ²³öÁ˽á¹û¡£Ë˵Áõ±¸ÊÖµ×ÏÂûÓÐÈ˲ţ¬ºÍ³Â¶°ÄêÁäÏà·ÂµÄÌïÔ¥ÄÜÁ¦±ã·Ç³£Ç¿£¬ÅܹýÀ´Ïò³Â¶°»ã±¨Á˽á¹û¡£
044 Áõ¸®¾ý²»ÑøÏÐÈË2(1/2),µã»÷ÏÂÒ»Ò³¼ÌÐøÔĶÁ