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September 20, 2014

September 20, 2014

Posted by **ashley** on Tuesday, February 12, 2013 at 5:14pm.

- calculus -
**Reiny**, Tuesday, February 12, 2013 at 5:45pmf ' (x) = (2/cosx)(-sinx) = -2tanx

f '' (x) = - 2sec^2 x

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