The derivative of (secx)^2?

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May 2nd 2009, 03:21 PM
rioneye

The derivative of (secx)^2?

I know this is a lot simpler than I think it is, but I just had a brain lapse :). Do any of you guys know what the he derivative of (secx)^2 is?
May 2nd 2009, 03:26 PM
Pinkk

Chain rule:

$2sec(x)\cdot \frac{d}{dx}sec(x)$
$2sec(x)\cdot sec(x)tan(x)$
$2sec^{2}(x)tan(x)$
May 2nd 2009, 03:29 PM
rioneye

Quote:

Originally Posted by Pinkk

Chain rule:

$2sec(x)\cdot \frac{d}{dx}sec(x)$
$2sec(x)\cdot sec(x)tan(x)$
$2sec^{2}(x)tan(x)$

Haha, I knew it would be simple. Thanks man

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