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¼ÐÃD: pure/appli maths question (in) ¤W¤@¥DÃD | ¤U¤@¥DÃD
 
chingyingtiktau
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[ ¥»©«³Ì«á¥Ñ chingyingtiktau ©ó 2008-8-3 02:58 PM ½s¿è ]




Freedom is the freedom to say that two plus two makes four. If that is granted, all else follows.
2008-8-2 02:15 PM#1
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let t= tan x/2
then dx=2dt/(1+t^2)
cosx = (1-t^2)/(1+t^2)
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¡ì = alt+41452
=>¡ì2dt/(5+5t^2+4-4t^2)
=2¡ìdt/(t^2+9)
=2/3(arc tan t/3)
=2/3[arc tan (tan x/2)/3]
2008-8-4 12:19 AM#2
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(¤£¹L¤µ®É¤µ¤é¦Ò¸Õ·|¦n¦n¤H...´£§ALet t=tan(x/2).....)




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2008-8-4 07:36 AM#3
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QUOTE:
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(¤£¹L¤µ®É¤µ¤é¦Ò¸Õ·|¦n¦n¤H...´£§ALet t=tan(x/2).....)
ÂI·|§r¡H CE Additional Maths ³£­ø´£°Õ...
2008-8-11 10:51 PM#4
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STEVE
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QUOTE:
­ì©«¥Ñ ¦Ë¥»¤Ó­¦ ©ó 2008-8-11 10:51 PM µoªí¡C


ÂI·|§r¡H CE Additional Maths ³£­ø´£°Õ...
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2008-8-12 02:18 PM#5
¬d¬Ý¸ê®Æ  Blog  µoµu°T  ³»³¡
     

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