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 Discussion Response Post to:
please
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 18 Feb 2008 16:57:35 IST
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kool amol i suppose u didnt retain ur cool when u typed
for many are ur own identities and not definitely present in
physics or maths or chemistry
the second one should be
tan^2A=sec^2A -1
cot^2A=cosec^2A-1
cos(a+b) is cosa cosb - sina sinb
and finally sin(90-A) is cos A
pls be more careful when u type next time around
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