Author Topic: maths integration 3 questions  (Read 1701 times)

Offline SGVaibhav

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maths integration 3 questions
« on: December 15, 2009, 08:09:37 pm »
1) Integrate   x . arc tan x                        (x multiplied by tan inverse x)
2) Integrate  e^x . cos x                         (e to the power x multiplied by cos x)
3) Integrate  sec^3 x                              (sec cube x)

need with working

u can start by posting answers from 1st question
i think the required method is integration by parts, but im not getting the answer.

Offline SGVaibhav

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Re: maths integration 3 questions
« Reply #1 on: December 15, 2009, 09:54:27 pm »
no problem

i found the answer..

Offline astarmathsandphysics

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Re: maths integration 3 questions
« Reply #2 on: December 16, 2009, 12:38:40 am »
To all the questions?

Offline SGVaibhav

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Re: maths integration 3 questions
« Reply #3 on: December 16, 2009, 02:30:41 pm »
yes

took me like 2 hours 45 mins :P

Offline astarmathsandphysics

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Re: maths integration 3 questions
« Reply #4 on: December 16, 2009, 03:52:54 pm »
Good. Those qs are tricky