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evilxshadow 08-22-2012 04:49 PM

Integration
 
Integrate
1) ln(e^2x) / x^2 dx


2)cos^2 (x/5)sin(x/5)dx


any help please? i'd like to see how u did them.

Nebula 08-22-2012 04:58 PM

Since I feel lazy try this.
Go to wolfram alpha.com
Type in integrate (function here) into the box. It will compute the answer. Hit show steps.

ln(e^2x)=2xln(e)=2x
Second one is by subsitution of u=cosx
Or realizing the what the derivative of cos^3(x) is, messing around with the constants and applying the fundamental theorem of calculus.

evilxshadow 08-22-2012 05:46 PM

Quote:

Originally Posted by Cepheid (Post 1761015)
Since I feel lazy try this.
Go to wolfram alpha.com
Type in integrate (function here) into the box. It will compute the answer. Hit show steps.

ln(e^2x)=2xln(e)=2x
Second one is by subsitution of u=cosx
Or realizing the what the derivative of cos^3(x) is, messing around with the constants and applying the fundamental theorem of calculus.

ah thx, that site helped alot


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