Question

Could you help me out on this ?


https://www.dropbox.com/s/6msdfzewlibz6pv/Screenshot%202013-11-04%2008.18.13.jpg

I know that u has to be the numerator but still I can't substitute for du

Answer 1

why not ?
du =... ?

Answer 2

after subs....the answer will be in terms of sin^-1

Answer 3

du -e^-x

Answer 4

I thought it would be an inverse trig problem.

Answer 5

yes if it wasn't for the limits, I think

Answer 6

so whats your new integral in terms of u ?

Answer 7

Remember that e^0 = 1

Answer 8

-arcsin0 + arcsin1 + c

Answer 9

@hartnn

Answer 10

btw why are there limits involved in the solution ? http://screencast.com/t/HxEu3ROkthGR

Answer 11

@hartnn

Answer 12

1 and 0

Answer 13

i'll let batman help u

Answer 14

oki

Answer 15

Did you understand how they got that answer though? pi/2?

Answer 16

yea I understand but why we didn't use limits and they somehow involved limits ?

Answer 17

When you use a u substitution you have to change the limits remember?

Answer 18

yes