Thread: Small integral problem (one step)

I'm not great when it comes to integrals.

I have

Sin^2(2x)

I know Sin(x) goes to -Cos(x), and Sin(2x) would go to -Cos(2x)(2), right?

I just don't know how to approach Sin^2(2x)

thanks

I have a follow up question.

Doing a seperate part of the same question, I have xsin(2x)

Would this be [(x^2)(-cos(2x)(2)]/2 ?

Originally Posted by JTG2003

I have a follow up question.

Doing a seperate part of the same question, I have xsin(2x)

Would this be [(x^2)(-cos(2x)(2)]/2 ?

no ... has to be done by parts.

Originally Posted by skeeter

no ... has to be done by parts.

Done by parts? Sorry, I don't know what you mean by that ...

Originally Posted by JTG2003

Done by parts? Sorry, I don't know what you mean by that ...

Integration by parts.

If you don't know this technique then I don't know why you'd be asked to solve this integral (unless you were previously asked to find the derivative of ).

Sorry, I'm taking calc + calc II as summer classes.. it's all going very fast. I'm having a hard time keeping up.

Originally Posted by JTG2003

Sorry, I'm taking calc + calc II as summer classes.. it's all going very fast. I'm having a hard time keeping up.

recommend you visit this site ... it has much help to offer you in your current academic predicament

Pauls Online Notes : Calculus II - Integration by Parts