ú¡Ç¹á¹Ð¹Ó˹ѧÊ×ͤ³ÔµÈÒʵÃì
ú¡Ç¹á¹Ð¹Ó˹ѧÊ×ͤ³ÔµÈÒʵÃì ¢Ñé¹ Á.µé¹ áÅÐ Á.»ÅÒ ÀÒ¤ÀÒÉÒä·Â
»ÃÐàÀ··Õè 1 à¹×éÍËÒ ÅÐàÍÕ´áÅÐÅÖ¡ ÂÔè§ä´é·Õèä»·ÕèÁҢͧá¹Ç¤Ô´áÅÐÊٵà ÂÔ觴դÃѺ »ÃÐàÀ··Õè 2 Ẻ½Ö¡ËÑ´ §èÒ ¡ÅÒ§ ¤è͹¢éÒ§ÂÒ¡ ÂÒ¡ áÅÐÂÒ¡ÁÒ¡¤ÃѺ àÁ×èÍà»ÃÕºà·Õº¡ÑºË¹Ñ§Ê×ÍàÃÕ¹¤³ÔµÈÒʵÃì¢Í§ ÊÊÇ·¤ÃѺ à¾ÃÒе͹¹Õé¼Á仵ÒÁà¡çºË¹Ñ§Ê×ÍàËÅèÒ¹ÕéÁÒáÅéÇ áµèÁѹÃÙéÊÖ¡¢Ò´æ Âѧä§äÁèÃÙé¤ÃѺ (µÍ¹¹Õé¡ÓÅѧÃÍà§Ô¹ÍÂÙè ÇèÒÍÒ¨¨Ð«×éÍ˹ѧÊ×ÍẺàÃÕ¹¢Í§»ÃжÁÁÒÅͧ´Ù´éÇÂ) Êèǹ˹ѧÊ×Íâ¤Ã§¡ÒÃâÍÅÔÁ»Ô¡¹Õé ä¡Åà¡Ô¹½Ñ¹¤ÃѺ áÅÐÁÕã¤ÃÃÙéÇèÒ¨ÃÔ§äËÁ¤ÃѺ ÇèÒâçàÃÕ¹´Ñ§æ à¢ÒäÁèä´éã¢é˹ѧÊ×ÍàÃÕ¹¢Í§ ÊÊÇ· áµèà»ç¹Ë¹Ñ§Ê×Í੾ÒСÅØèÁ (ÍÂÒ¡ä´é¤ÃѺ) |
˹ѧÊ×ÍàÅ¢¢Í§ µÍ. ¼ÁàË繨ÐÁÕẺ½Ö¡ËÑ´·ÕèâçàÃÕ¹·ÓÁÒ ÁÕ¢Ò·ÕèÊˡóìâçàÃÕ¹ áµèºÑ§¤Ñº«×é͵Ñé§áµèà»Ô´à·ÍÁ
¨Ðà»ç¹à¹é¹¾Ç¡â¨·ÂìàÊÕÂÁÒ¡¡ÇèÒ àÍÒ⨷Âì¢éÍÊͺà¡èÒ ¢éÍÊͺÊÁÒ¤Á âÍÅÔÁ»Ô¡Ãͺáá àÍç¹·ÃÒ¹Êì ËÃ×Í⨷Âì·Õè´ÙàËÁ×͹ÂÒ¡ ÁÒÂÓ æ ÃÇÁ¡Ñ¹¤ÃѺ. :) |
¢Íº¤Ø³¾Õè¡Í¹ ·Õèà¢éÒÁҵͺ¤ÃѺ
¤×ÍÁÕâÍ¡ÒÊÊ͹¾ÔàÈÉà´ç¡á¶ÇºéÒ¹(¨ÐÇèÒÊ͹¾ÔàÈɡ礧äÁèàªÔ§) áÅéÇàËÁ×͹¡Ñºà´ç¡à¢ÒäÁèÁÕ¤ÇÒÁÃÙé äÁèÁÕ¾×é¹°Ò¹àŹФÃѺ ·Ñ駷Õèà»ç¹¤ÇÒÁÃÙéÃдѺªÑé¹ Á.µé¹ (à´ç¡ÍÂÙè Á.3) ¡çàÅÂÍÂÒ¡¨Ð»Ù¾×é¹à¢ÒãËéá¹è¹æ áµè¾Íà¨ÍẺ¹Õé¼Á¡ÅѺÃÙéÊÖ¡äÁèÁÑè¹ã¨µÑÇàͧ¢Öé¹ÁÒ ¡çàÅÂÍÂÒ¡¶×ÍâÍ¡ÒʹÕé¿×鹤ÇÒÁÃÙé áÅоѲ¹Ò¤ÇÒÁÃÙéµ¹àͧ仴éǤÃѺ |
ÍéÒ§ÍÔ§:
Ê͹Ẻ»Ù¾×é¹°Ò¹ ¶éÒ¹Ò¹ä» à´ç¡ÍÒ¨¨ÐÃÙéÊÖ¡àº×èͤÃѺ à¾ÃÒШÐÃÙéÊÖ¡ÇèҨШѺÍÐäÃäÁèä´é äÁèÃÙéÇèÒ·ÕèàÃÕ¹ÍÂÙèÁѹ¨Ðä»»ÃÐÂØ¡µìãªéä´éÍÂèÒ§äà ÍÕ¡ÇÔ¸Õ˹Ö觡ç¤×Í¡ÒÃÊ͹Ẻà¹é¹·Ó⨷Âì¤ÃѺ (Learning through Problem Solving ) ¤×ÍàÃÒ¨ÐäÁèà¹é¹à¹×éÍËÒ¾×é¹°Ò¹·ÕèÂÒÇ仹ѡ áµè¾ÍÊ͹à¹×éÍËҵç¹Õé¹Ô´Ë¹èÍ àÃÒ¡ç¨Ðâ¹»ÑËÒãËé·Ó¤ÃѺ ÇèÒ¨Ò¡·Õèà¾Ôè§àÃÕ¹仹Õè ¨Ðä»»ÃÐÂØ¡µì·Ó⨷ÂìÍÐäÃä´éºéÒ§ ¤×Íà¨ÒÐà»ç¹àÃ×èͧ æ ä» äÁèµéͧÃÕºÁÒ¡ ÍÂèÒ§ÊÁÁµÔÇèÒ ¶éÒàÃÕ¹µÃÕ⡳ÁÔµÔàÃ×èͧÊÙµÃÁØÁ 3 à·èÒ ¡çÍÒ¨¨Ð¡µÑÇÍÂèÒ§àªè¹ ä˹Åͧ¾ÔÊÙ¨¹ìÊÔÇèÒ $\cos 3A = 4\cos A \cos(60^{\circ} - A) \cos(60^{\circ}+ A)$ $\sin 3A = 4\sin A \sin(60^{\circ} - A) \sin(60^{\circ}+ A)$ $\tan 3A = \tan A \tan(60^{\circ} - A) \tan(60^{\circ}+ A)$ ·Ñé§áºº¨Ò¡«éÒÂä»ËÒ¢ÇÒ ËÃ×ͨҡ¢ÇÒÁÒËÒ«éÒ ËÃ×ͨÐàÍÒä»»ÃÐÂØ¡µìá¡é¢é͹Õéä´éÍÂèÒ§äà $(1-4\sin^2 9^{\circ})(1-4\sin^2 27^{\circ})(1-4\sin^2 81^{\circ})(1-4\sin^2 243^{\circ})=?$ $(1+\frac{2\cos\frac{\pi}{7}}{\cos\frac{3\pi}{7}})(1+\frac{2\cos\frac{2\pi}{7}}{\cos\frac{6\pi}{7}})(1+\frac{2\cos\frac{3\pi}{7} }{\cos\frac{6\pi}{7}})=?$ ¨ÐãËé´Õ¤ÇèÐÊ͹ÁØÁÁͧ¢Í§¤¹ÊÃéҧ⨷Âì´éǤÃѺ ¨Ðä´éʹءʹҹ¡ÇèÒà´ÔÁ :cool: |
àÇÅÒ·ÕèáÊ´§·Ñé§ËÁ´ à»ç¹àÇÅÒ·Õè»ÃÐà·Èä·Â (GMT +7) ¢³Ð¹Õéà»ç¹àÇÅÒ 13:22 |
Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Modified by Jetsada Karnpracha