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Help With A Question Pleassse (1 Viewer)

Thread starter ckckckck
Start date Jun 13, 2006

C

ckckckck

New Member

#1

<DIR>show that the differentiation of sec x = sec x tan x

i have nooo idea how to do that
</DIR>

P

pLuvia

Guest

#2

d/dx(secx)=d/dx(1/cosx)
=[cosx(0)-(-sinx)]/cos²x
=sinx/cos²x
=sinx/cosx.1/cosx
=tanxsecx
QED

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