AonZ
  • AonZ
Let t = tan x/2 write cos^2 (x/2) as 1/ sec^2 (x/2) and hence show that cos x = 1- t^2 / 1+t^2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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primeralph
  • primeralph
did this in high school........long time agooooooo.
primeralph
  • primeralph
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primeralph
  • primeralph
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AonZ
  • AonZ
wow you are good!! :)
AonZ
  • AonZ
thanks yet again!!! :D
primeralph
  • primeralph
Thank you. Had a good teacher in high school......even though was probably the only one who understood what he was teaching........
AonZ
  • AonZ
where are you from? im from sydney australia
primeralph
  • primeralph
HS or college?
primeralph
  • primeralph
I'm African, but I live in US.

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