[sdiy] DSP book recommendation wanted

Dave Manley dlmanley at sonic.net
Fri Sep 25 00:22:54 CEST 2009


Aaron Lanterman wrote:
> 
> On Sep 24, 2009, at 3:15 PM, Nathan M. Reeves wrote:
> 
>> lol
>>
>> if remember correctly...
>>
>> d/dx(cos(x))= -sin(x) <- yup
>>
>> d/dx(sin(x))= cos(x) <- yup
> 
>>
>> so...
> 
> In the below three, remove the d/dx in front and put dx at the end and 
> an indefinite integral symbol in front
> 
>> d/dx(cos(a x)) =-asin(a x) <- yup
>>
>> d/dx sin(a x) = acos(a x) <- yup
>>
>> d/dx e^(a x) = axe^(a x) <- remove the first x on the RHS, so it's a 
>> e^(a x)

In the old days, the CRC Handbook of Chemistry and Physics or their Math 
Handbook was the standby reference, today we have Mathworld:

http://mathworld.wolfram.com/Derivative.html

:-)

-Dave




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