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December 20, 2014

December 20, 2014

Posted by **AdrianV** on Tuesday, March 23, 2010 at 10:18pm.

if f(x)=cos(2x), then f'(pi/4)

derivatives and anti derivatives

please help

- Math-Derivitives -
**bobpursley**, Tuesday, March 23, 2010 at 10:21pmf(x)=x^3+5x

f'=2x^2+5

put in x=2

d (cos2x)/dx=-2sin2x

You need to examine why these are causing you difficulty,they are very elementary questions.

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