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Help With A Question Pleassse (1 Viewer)

C

ckckckck

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Joined
Feb 9, 2006
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HSC
2006
<DIR>show that the differentiation of sec x = sec x tan x

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

pLuvia

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