#1
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ÊÁ¡ÒáÓÅѧ2
$x^2+x=60$
$x=......$ ªèÇÂ˹èÍÂá¡éäÁèà»ç¹ |
#2
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$\frac{\sqrt{241}+1 }{2} áÅÐ\frac{\sqrt{-241}+1 }{2}$
½Ö¡ºèÍÂæ¨ÐªÓ¹Òàͧ
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24 µØÅÒ¤Á 2008 18:05 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ ¤usÑ¡¤³Ôm |
#3
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¢Íº¤Ø³ÁÒ¡ ¾Õè ¤¹ÃÑ¡¤³Ôµ
ÇèÒáµè COS A = SIN 6A A=....... 20 µØÅÒ¤Á 2008 18:59 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 2 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ à´ç¡»ÃжÁ |
#4
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ÍëÍ!!
$COS A =SIN 6A$ $A+6A =90$ $7A = 90$ $A=90/7$ $A=12\frac{6}{7}$ answer $A=12\frac{6}{7}ͧÈÒ$
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20 µØÅÒ¤Á 2008 19:03 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 3 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ ¤usÑ¡¤³Ôm |
#5
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¢Ö§àª×Í¡¨Ò¡ÂÍ´àÊÒÁÒÂѧ¾×é¹·ÓÁØÁ 37 ͧÈÒ àª×Í¡ÂÒÇ75 àÁµÃ àÊÒ¸§ÊÙ§???
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#6
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ÍéÒ§ÍÔ§:
$x/75=sin37$ »Å.¤ÇÃàÍÒ件ÒÁËéͧÁ.µé¹ÁÒ¡¡ÇèÒ¹Ð$x/75=3/5$ $x=45$ µÍº àÊÒ¸§ÊÙ§45 àÁµÃ
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20 µØÅÒ¤Á 2008 19:26 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 2 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ ¤usÑ¡¤³Ôm |
#7
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¢Íº¤Ø³ÁÒ¡ ¾Õ褹ÃÑ¡¤³Ôµ
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#8
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á¹è㨠ËØËØ
¢Ö§àª×Í¡¨Ò¡ÂÍ´àÊÒÁÒÂѧ¾×é¹·ÓÁØÁ 37 ͧÈÒ àª×Í¡ÂÒÇ75 àÁµÃ àÊÒ¸§ÊÙ§??? »ÃÐÁÒ³ 45 àÁµÃ¤ÃѺ |
#9
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ÍÂÒ¡ÃÙéà©Âæ ·ÓäÁµéͧ»ÃÐÁÒ³´éÇÂËÃÍ???
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#10
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¤èҿѧ¡ìªÑè¹µÃÕ⡳ÍÂèÒ§ $sin\theta,cos\theta,..$ Áѹ¨Ðà»ç¹¤èÒ»ÃÐÁÒ³¤ÃѺ$(sin\theta\approx\frac{3}{5}$àÁ×èÍ $\theta$ à»ç¹ÁØÁ·Õèàª×Í¡·Ó¡Ñº¾×é¹ $= 37$ͧÈÒ ¶éÒ¨ÐãËéÅÐàÍÕ´áÅж١µéͧ¡ÇèÒ¹ÕéµéͧºÍ¡´éÇÂÇèÒàÊÒ¸§·ÓÁØÁÍÐäáѺ¾×é¹ µÑé§áµèà¡Ô´ÁÒ¡çàËç¹ÁѹµÑ駩ҡµÅÍ´¹ÕèáËÅФÃѺ )
20 µØÅÒ¤Á 2008 19:34 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ [SIL] |
#11
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ÍéÒ§ÍÔ§:
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#12
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ËØËØ
¼ÁÇèÒ¹èÒ¨Ð件ÒÁ·ÕèÁ.µé¹ÁÒ¡¡ÇèҹФѺ ààËÁà´ç¡à´ÕèÂǹÕé ¼ÙéãËèàËç¹ààÅéÇ˹ÒÇ
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¤¹àÃÒËÒ¡ÅéÁ¡çµéͧÅØ¡ ¼Ùéã´ÅéÁààÅéÇäÁèÅØ¡¼Ùé¹Ñé¹ÂÔ觡ÇèÒÊعѢ ÊعѢÁѹÅéÁààÅéÇÁѹÂѧÅØ¡ä´é ààÅéÇ·ÓäÁ¤¹¶Ö§¨ÐÅØ¡äÁèä´é |
#13
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ÍéÒ§ÍÔ§:
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#14
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Í×Á¤ÃѺ¼ÁËÁÒ¶֧Ẻ ÁØÁ 37 ͧÈÒ 53 ͧÈÒà¹ÕèÂÍèФÃѺ¤×ͤèÒ»ÃÐÁÒ³
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#15
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àÍÍ
¼Ô´ËÃ×Í»èÒǤѺ ¶éÒäÁèàª×èÍÅͧàà·¹¤èÒ´Ùä´é¤Ñº $x^2+x=60$ $x^2+x-60=0$ ãªéÊÙµÃàà¡ÊԤѺ¹Õè $x=\frac{-b\pm \sqrt{b^2-4ac} }{2a} $ ¨Ðä´é¤ÓµÍº¤×Í $\frac{-1\pm \sqrt{241} }{2} $ ¤Ñº¼Á
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¤¹àÃÒËÒ¡ÅéÁ¡çµéͧÅØ¡ ¼Ùéã´ÅéÁààÅéÇäÁèÅØ¡¼Ùé¹Ñé¹ÂÔ觡ÇèÒÊعѢ ÊعѢÁѹÅéÁààÅéÇÁѹÂѧÅØ¡ä´é ààÅéÇ·ÓäÁ¤¹¶Ö§¨ÐÅØ¡äÁèä´é 23 µØÅÒ¤Á 2008 13:28 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 2 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ ¡Ãza_ba_yo |
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