~ Nature's Huat ah! Blog ~

• jay_rocks

  6 Feb 06, 15:20

  Originally posted by poon cho tang:

  cosex?

  too fast. its cosec x. noe nt?
• poon cho tang

  6 Feb 06, 15:27

  Originally posted by jay_rocks:

  (cosex x -1) (cosec x + 1) ( sec x -1) ( sec x + 1) = 1
  
  how to do?

  (cosex x -1) (cosec x + 1) ( sec x -1) ( sec x + 1)
  = (cosec^2 x - 1) (sec^2 x - 1)
  = (cot^2 x )(tan^2 x)
  = 1
  
  
• poon cho tang

  6 Feb 06, 15:27

  lebbrel up~
• jay_rocks

  6 Feb 06, 15:27

  Originally posted by poon cho tang:

  (cosex x -1) (cosec x + 1) ( sec x -1) ( sec x + 1)
  = (cosec^2 x - 1) (sec^2 x - 1)
  = (cot^2 x )(tan^2 x)
  = 1
  
  

  whr did the -1 go??
• jay_rocks

  6 Feb 06, 15:28

  Originally posted by jay_rocks:

  whr did the -1 go??

  noe liao. but how to get 1 then...
• poon cho tang

  6 Feb 06, 15:29

  Originally posted by jay_rocks:

  whr did the -1 go??

  cos (cosec^2 x - 1) = (cot^2 x )
  
  (sec^2 x - 1) = (tan^2 x)
  
  so in the end they can cancel each other out loh
• jay_rocks

  6 Feb 06, 15:29

  Originally posted by jay_rocks:

  noe liao. but how to get 1 then...

  orh...... 1/ tan^2 x( tan^2 x) = 1. yeah~~
• jay_rocks

  6 Feb 06, 15:30

  Originally posted by poon cho tang:

  cos (cosec^2 x - 1) = (cot^2 x )
  
  (sec^2 x - 1) = (tan^2 x)
  
  so in the end they can cancel each other out loh

  i do until sec^2 x -1 can change to tan^2 - 1. ylrc..
• poon cho tang

  6 Feb 06, 15:30

  Originally posted by jay_rocks:

  orh...... 1/ tan^2 x( tan^2 x) = 1. yeah~~

  hooray, can go back eat ber
• jay_rocks

  6 Feb 06, 15:31

  Originally posted by poon cho tang:

  hooray, can go back eat ber

  muz cheong trigo and log first.
• poon cho tang

  6 Feb 06, 15:32

  Originally posted by jay_rocks:

  i do until sec^2 x -1 can change to tan^2 - 1. ylrc..

  neeh mind, dats wot mc r for
• jay_rocks

  6 Feb 06, 15:32

  another one. 1 / 1+ sin x + 1/ 1-sin x = 2 sec^2 x
• poon cho tang

  6 Feb 06, 15:33

  Originally posted by jay_rocks:

  muz cheong trigo and log first.

  sianz...trigo belly mahuan
• jay_rocks

  6 Feb 06, 15:34

  Originally posted by poon cho tang:

  neeh mind, dats wot mc r for

  let ur brain go ki siao.
• jay_rocks

  6 Feb 06, 15:34

  Originally posted by poon cho tang:

  sianz...trigo belly mahuan

  yah lah. tts why. log and trigo can fight
• poon cho tang

  6 Feb 06, 15:37

  Originally posted by jay_rocks:

  another one. 1 / 1+ sin x + 1/ 1-sin x = 2 sec^2 x

  1 / (1+ sin x) + 1/ (1-sin x)
  = (1 - sin x + 1 + sin x) / (1+sinx)(1-sinx)
  = 2 / (cos^2 x)
  = 2 sec^2 x
  
  
• poon cho tang

  6 Feb 06, 15:38

  Originally posted by jay_rocks:

  yah lah. tts why. log and trigo can fight

  log still ok, bian lai bian qu still the same
  
  trigo too many identities to remember
• poon cho tang

  6 Feb 06, 15:39

  Originally posted by jay_rocks:

  let ur brain go ki siao.

  jiak ber kir koon betta
• jay_rocks

  6 Feb 06, 15:40

  Originally posted by poon cho tang:

  1 / (1+ sin x) + 1/ (1-sin x)
  = (1 - sin x + 1 + sin x) / (1+sinx)(1-sinx)
  = 2 / (cos^2 x)
  = 2 sec^2 x
  
  

  how u get 2 sec^2 x
• jay_rocks

  6 Feb 06, 15:41

  Originally posted by jay_rocks:

  how u get 2 sec^2 x

  ok noe liaos.
  
  nb. how to become smart at this stuffS????
• poon cho tang

  6 Feb 06, 15:41

  Originally posted by jay_rocks:

  how u get 2 sec^2 x

  1 / cos^2 x = sec^2 x mah
• jay_rocks

  6 Feb 06, 15:41

  Originally posted by poon cho tang:

  log still ok, bian lai bian qu still the same
  
  trigo too many identities to remember

  aiya, hate both. tts what i noe. didn noe maths can be so troublesome. daily life oso wont use de keep appearing.
• jay_rocks

  6 Feb 06, 15:42

  Originally posted by poon cho tang:

  jiak ber kir koon betta

  dun wan. its betta to do work rather than koon.
  
  sians. got ss hw, too bad cannot do cauz no notes.
• poon cho tang

  6 Feb 06, 15:43

  Originally posted by jay_rocks:

  ok noe liaos.
  
  nb. how to become smart at this stuffS????

  just understand can liows, no nid to be smart
• poon cho tang

  6 Feb 06, 15:44

  Originally posted by jay_rocks:

  aiya, hate both. tts what i noe. didn noe maths can be so troublesome. daily life oso wont use de keep appearing.

  x2
  
  count $ & ¢ betta