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Sarangnamu.net June 17, 2003
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strudy view ¶õ¿¡ [img] code Ãß°¡
2007-08-14
(kurome)
219
http://blog.naver.com/sdh9393?Redirect=Log&logNo=60038377783
2007-06-27
(kurome)
218
http://www.microsoft.com/korea/msdn/smartclient/community/wffaq/dotnet.aspx
2007-06-26
(1)
217
static ÇԺηΠ¾²Áö ¸»ÀÚ -_ - °³ÇÇ봣´Ù.
2007-06-08
(1)
216
´ëº¯ a,b,cÀÇ °ªÀ» ¾Ë°íÀÖÀ» ¶§ °¢ A, B, C ¸¦ ±¸ÇÏ´Â °ø½Ä
AÀÇ ´ëº¯À» a
BÀÇ ´ëº¯À» b
CÀÇ ´ëº¯À» c
====ù¹øÂ° ¹æ¹ý
s = 1/2 (a+b+c)
cos A/2 = ·çÆ®((s(s-a)/bc))
cos B/2 = ·çÆ®((s(s-b)/ca))
cos C/2 = ·çÆ®((s(s-c)/ab))
°ªÀº ÇØ´ç °¢ÀÇ 2µîºÐÇÑ °ªÀÌ ³ª¿É´Ï´Ù.
»ï°¢ÇÔ¼öÇ¥¿¡¼ °¢µµ·Î ȯ»êÇÑ´ÙÀ½ °öÇϱâ2¸¦ ÇØÁÖ¸é µË´Ï´Ù.
°øÇÐ¿ë °è»ê±â¸¦ »ç¿ëÇÏ·Á¸é 2µîºÐµÈ °ª¿¡ COS-1(¾ÆÅ©ÄÚ»çÀÎ)À» ÇØ¼
³ª¿Â °ª¿¡ °öÇϱâ 2¸¦ ÇÏ°í °¢µµ·Î ȯ»ê.
°Ë»ê = °¢ABC = 180µµ
====µÎ¹øÂ° ¹æ¹ý
cosA = ((b^ + c^ - a^) / 2bc)
cosB = ((c^ + a^ - b^) / 2ca)
cosC = ((a^ + b^ - c^) / 2ab)
°øÇÐ¿ë °è»ê±â·Î ÇÒ¶§
³ª¿Â °ª¿¡ cos-1(¾ÆÅ©ÄÚ»çÀÎ) Çϰí
°¢µµ·Î ȯ»ê.
ù ¹øÂ° ¹æ¹ýÇÏ°í µÎ ¹øÂ° ¹æ¹ýÇϰí´Â ¾à°£ÀÇ ¿ÀÂ÷°¡ ¹ß»ýÇÕ´Ï´Ù.
2007-06-05
(kurome)
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