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  • Sarangnamu.net June 17, 2003
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    1. 220strudy view ¶õ¿¡ [img] code Ãß°¡2007-08-14(kurome)
    2. 219http://blog.naver.com/sdh9393?Redirect=Log&logNo=600383777832007-06-27(kurome)
    3. 218http://www.microsoft.com/korea/msdn/smartclient/community/wffaq/dotnet.aspx2007-06-26(1)
    4. 217static ÇԺηΠ¾²Áö ¸»ÀÚ -_ - °³ÇÇ봣´Ù.2007-06-08(1)
    5. 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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