How do you integrate x sin(2x) ?

Question

anonymous · Answer

I would suggest integration by parts. $$\int\limits u dv=uv-\int\limits vdu$$

anonymous · Answer

yeah i chose u=xdx and du as dx . Then i picked dv=sin(2x) and i was trying to integrate that but idk what that is

anonymous · Answer

hmm, my integration is a little rusty, haven't had calculus for a year or so... let me see if I can work it.

anonymous · Answer

ok thanks

anonymous · Answer

oh never mind i got it

anonymous · Answer

thanks though

anonymous · Answer

i realized i used the formula wrong

anonymous · Answer

haha no problem, glad you got it.  Are you in calculus 1 or 2?  2 is pretty tough, getting good at integration is highly suggested.

anonymous · Answer

I'm takgin Advanced Placement Calc BC in high school

anonymous · Answer

yeah knowing how to integrate and differentiate is key in calculus...without those 2 skills its definitely hard

anonymous · Answer

Ahh, well good luck on that AP test haha, I remember it well

anonymous · Answer

oh man its coming up soooo soon and i feel soo unready for the test. it sucks becase my teacher was so awesome but i cant remeber things easily

anonymous · Answer

did u do well on the AP if u dont mind me asking