(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the derivative of:

f(x)= ((x+xsinx)/(1+2tan^{2}x))^{3}

3. The attempt at a solution

I solved it and got :

f'(x)= (3(1+2tan^{2}x)^{3}(x+xsinx)^{2}(sinx+xcosx+1)-12(x+xsinx)^{3}(2tan^{2}x+1)^{2}(tanxsec^{2}x))/(1+2tan^{2}x)^{6}

Can anyone confirm if this is alright?

Also, anyone knows a webpage that has an online calculator that would confirm this kind of math problems?

Thanks.

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# Homework Help: Another derivative confirmation.

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