Question

Hello I need help starting this problem.. may someone help me Number 7 Please!

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Answer 1

http://www.wolframalpha.com/input/?i=int+%28e^%28-2x%29+sin+%286x%29+dx

Answer 2

have you tried using integration by parts?

Answer 3

Yes im trying to figure out what should be my U or V'

Answer 4

when I worked it out, I let

u = e^(-2x)
dv = sin(6x)

I used x instead of theta

Answer 5

so,

du = -2e^(-2x)
v = -(1/6)*cos(6x)

Answer 6

ahh no wonder i let u=sin6theta

Answer 7

ok think i should be able to solve it!.. attempting it now thanks Jim!

Answer 8

either way works because you can derive or integrate either piece

Answer 9

you're welcome