#1
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#2
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ÃÐÂзҧàªÔ§ÁØÁËÃ×ͤÇÒÁÂÒÇÊèǹâ¤é§(ÁÑé§)¤ÃѺ ˹èÇÂà»ç¹àÃà´Õ¹¤ÃѺ $\pi$ àÃà´Õ¹ $=180^{\circ}$ ¤ÃѺ Åͧà»Ô´ËÒã¹Ë¹Ñ§Ê×ÍàÃÕ¹Á.5´Ù¤ÃѺ
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#3
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#5
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$$\sin 270^{\circ}=\sin (\pi+\dfrac{\pi}{2})=\sin \dfrac{\pi}{2}=1$$
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#6
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#7
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#9
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¹èÒ¨ÐÁÒ¨Ò¡·ÕèàÃÒ·ÃÒºÇèÒ¤èҢͧ $|sin\theta| , |cos\theta|$ ¨ÐäÁèà¡Ô¹ 1 ˹èÇÂàÇÅÒÁÒÇÒ´à»ç¹¡ÃÒ¿ à¾×èͨÐËÒ¤èҢͧ¿Ñ§¡ìªÑè¹ ¨ÐÍÂÙ躹àÊé¹Ãͺǧ¢Í§Ç§¡ÅÁ 1 ˹èÇÂàÊÁͤÃѺ (ÃÙéÊÖ¡ÇèÒÅѡɳСÃÒ¿Áѹà»ç¹àÊé¹ÁÒÁèÒ¹Õè¹Ò - - ¢Ñ´¡Ñ¹àͧáÎÐ ªèÇÂãËéà¤ÅÕ·դÃѺ)
02 ¾ÄÉÀÒ¤Á 2009 22:35 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ [SIL] |
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