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AonZ
Group Title
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
 one year ago
 one year ago
AonZ Group Title
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
 one year ago
 one year ago

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primeralph Group TitleBest ResponseYou've already chosen the best response.1
did this in high school........long time agooooooo.
 one year ago

primeralph Group TitleBest ResponseYou've already chosen the best response.1
dw:1370147814899:dw
 one year ago

primeralph Group TitleBest ResponseYou've already chosen the best response.1
dw:1370147962686:dw
 one year ago

AonZ Group TitleBest ResponseYou've already chosen the best response.0
wow you are good!! :)
 one year ago

AonZ Group TitleBest ResponseYou've already chosen the best response.0
thanks yet again!!! :D
 one year ago

primeralph Group TitleBest ResponseYou've already chosen the best response.1
Thank you. Had a good teacher in high school......even though was probably the only one who understood what he was teaching........
 one year ago

AonZ Group TitleBest ResponseYou've already chosen the best response.0
where are you from? im from sydney australia
 one year ago

primeralph Group TitleBest ResponseYou've already chosen the best response.1
HS or college?
 one year ago

primeralph Group TitleBest ResponseYou've already chosen the best response.1
I'm African, but I live in US.
 one year ago
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