²é¿´: 10459  |  »Ø¸´: 18
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

µÂÖÝѧԺ

ľ³æ (ÕýʽдÊÖ)

[ÇóÖú] ΪʲôÎïÀíÉÏÒ»°ã×öcosx=e^(ix)´¦Àí¶øÊýѧÉÏÅ·À­¹«Ê½cosx=(e^(ix)+e^(-ix))/2 ÒÑÓÐ10È˲ÎÓë

Á½Õß²îÁËÒ»¸öÐ鲿£¬Ôõô½âÊÍ£¿£¿£¿¹âѧ£¬Á¿×ÓÁ¦Ñ§ÖÐÖÐ×÷Èç´Ë´¦Àícosx=e^(ix)£¬ÊýѧÉÏȷʵcosx=(e^(ix)+e^(-ix))/2£¬ºýÍ¿ÁË£¿£¿
»Ø¸´´ËÂ¥

» ÊÕ¼±¾ÌûµÄÌÔÌûר¼­ÍƼö

°Ù±¦Ïä

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

leongoall

ר¼Ò¹ËÎÊ (ÖªÃû×÷¼Ò)

P-M-IÖ®³õÉúÅ£¶¿

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
Á¿ºÜСµÄʱºò£¬ÊÇ·ñÒòΪÎïÀíÉÏÖ±½Ó×öÁ˽üËÆ´¦Àí£¬Ð鲿sinx=0ÄØ£¿
³ÃÄêÇᣬ¶àÕÛÌÚ£¡ÔøÄêÇᣬÕÛÌÚ¹ý£¿£¡
3Â¥2014-05-04 19:11:08
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 19 ¸ö»Ø´ð

ÐÜè»¶»¶

гæ (³õÈëÎÄ̳)

ÄãÃǶ¼ºÃÀ÷º¦°¡£¬ÎÒÍêÈ«¿´²»¶®
2Â¥2014-05-04 19:07:57
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

postgradu

гæ (СÓÐÃûÆø)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
Ó¦¸ÃÊÇcos(x)=re(exp(ix))°É£¬¼´È¡¸´Ö¸ÊýµÄʵÊý²¿·ÖΪÓàÏÒÖµ¡£ÒòΪÎïÀíÉÏ´æÔڵĴó¶¼ÊÇʵÊý£¬ËùÒÔÓÃÓàÏÒ±íʾ²¨¶¯£¬µ«ÊýѧÉÏΪÁ˼ÆËã·½±ã²ÉÓø´Ö¸ÊýÐÎʽ£¬Á½Õßͨ¹ýÅ·À­¹«Ê½ÁªÏµ¡£

[ ·¢×ÔÊÖ»ú°æ http://muchong.com/3g ]
4Â¥2014-05-04 19:12:34
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

YGZYDR

гæ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
ÎïÀíÖгöÏÖµÄcosx²»½ö½öÊÇʵº¯Êý£¬xÊǸ´Êý£¬cosxҪȡe^(ix)£¬ËüµÄ¹²éîÊÇcos(-x)£¬ÕâÑù¸ü¾ßÓÐÆÕ±éÒâÒå¡£ÊýѧÉϵÄcosxÊÇʵº¯Êý¡£

[ ·¢×ÔÊÖ»ú°æ http://muchong.com/3g ]
5Â¥2014-05-04 19:13:12
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] ÉúÎïѧ071000 329·ÖÇóµ÷¼Á +4 ÎÒ°®ÉúÎïÉúÎﰮΠ2026-03-17 4/200 2026-03-22 08:34 by hxsm
[¿¼ÑÐ] 333Çóµ÷¼Á +5 87639 2026-03-21 7/350 2026-03-21 19:31 by ColorlessPI
[¿¼ÑÐ] 0703»¯Ñ§µ÷¼Á +4 ÄÝÄÝninicgb 2026-03-21 4/200 2026-03-21 18:39 by ѧԱ8dgXkO
[¿¼ÑÐ] 311Çóµ÷¼Á +3 Ó¸ҵÄСÎâ 2026-03-20 3/150 2026-03-21 17:40 by ColorlessPI
[¿¼ÑÐ] 296Çóµ÷¼Á +4 www_q 2026-03-20 4/200 2026-03-21 17:26 by ѧԱ8dgXkO
[¿¼ÑÐ] 336Çóµ÷¼Á +5 rmc8866 2026-03-21 5/250 2026-03-21 17:24 by ѧԱ8dgXkO
[¿¼ÑÐ] 26¿¼ÑÐÒ»Ö¾Ô¸ÖйúʯÓÍ´óѧ(»ª¶«)305·ÖÇóµ÷¼Á +6 ¼ÎÄêÐÂ³Ì 2026-03-15 6/300 2026-03-21 17:07 by Dream007008
[¿¼ÑÐ] 279·ÖÇóµ÷¼Á Ò»Ö¾Ô¸211 +14 chaojifeixia 2026-03-19 15/750 2026-03-21 13:24 by zhukairuo
[¿¼ÑÐ] ²ÄÁÏ 336 Çóµ÷¼Á +3 An@. 2026-03-18 4/200 2026-03-21 01:39 by JourneyLucky
[¿¼ÑÐ] Ò»Ö¾Ô¸ÎäÀí²ÄÁÏ305·ÖÇóµ÷¼Á +6 ÏëÉϰ¶µÄÀðÓã 2026-03-18 7/350 2026-03-21 01:03 by JourneyLucky
[¿¼ÑÐ] Ò»Ö¾Ô¸Î÷ÄϽ»´ó£¬Çóµ÷¼Á +5 ²Ä»¯ÖðÃÎÈË 2026-03-18 5/250 2026-03-21 00:26 by JourneyLucky
[¿¼ÑÐ] ҩѧ383 Çóµ÷¼Á +3 ҩѧchy 2026-03-15 5/250 2026-03-20 22:11 by ÔÆÓÎÖØÑô
[¿¼ÑÐ] 350Çóµ÷¼Á +5 weudhdk 2026-03-19 5/250 2026-03-20 22:04 by luoyongfeng
[¿¼ÑÐ] ²ÄÁÏѧÇóµ÷¼Á +4 Stella_Yao 2026-03-20 4/200 2026-03-20 20:28 by ms629
[¿¼ÑÐ] ÕÐÊÕµ÷¼Á˶ʿ +4 lidianxing 2026-03-19 12/600 2026-03-20 12:25 by lidianxing
[¿¼ÑÐ] 0703»¯Ñ§µ÷¼Á +5 pupcoco 2026-03-17 8/400 2026-03-19 13:58 by houyaoxu
[¿¼ÑÐ] Ò»Ö¾Ô¸¸£´ó288Óлú»¯Ñ§£¬Çóµ÷¼Á +3 Сľ³æ200408204 2026-03-18 3/150 2026-03-19 13:31 by houyaoxu
[¿¼ÑÐ] 328Çóµ÷¼Á£¬Ó¢ÓïÁù¼¶551£¬ÓпÆÑо­Àú +4 ÉúÎ﹤³Ìµ÷¼Á 2026-03-16 12/600 2026-03-19 11:10 by ÉúÎ﹤³Ìµ÷¼Á
[¿¼ÑÐ] ±¾¿ÆÖ£ÖÝ´óѧÎïÀíѧԺ£¬Ò»Ö¾Ô¸»ª¿Æ070200ѧ˶£¬346Çóµ÷¼Á +4 ÎÒ²»ÊÇÒ»¸ù´Ð 2026-03-18 4/200 2026-03-19 09:11 by ¸¡ÔÆ166
[¿¼ÑÐ] ÖпÆÔº²ÄÁÏ273Çóµ÷¼Á +4 yzydy 2026-03-15 4/200 2026-03-16 15:59 by Gaodh_82
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û