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May 17th, 2009, 03:48 PM   #1
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Evaluate integral

evaluate

integrate 2x ( tan ^-1 (4x) )

how do u make integral signs?
and how do i make -1 superscript?

wat i tried doing here was

integration by parts

uv - integral vdu

that led me in circles

i got

x^2 tan ^-1 (4x ) - integral of (x^2)/(1+16x^2)

that going in the right direction?
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May 17th, 2009, 04:02 PM   #2
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Re: Evaluate integral

Yes, that looks like a good start.

To integrate the last one,

Rewrite it as
 
May 17th, 2009, 04:13 PM   #3
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Re: Evaluate integral

Quote:
Originally Posted by symopp
how do u make integral signs?
and how do i make -1 superscript?
I use MathType. When the 30 day trial is up, it reverts to the Lite version ...still great. Or you can try this:

http://mmlsoft.com/
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May 17th, 2009, 04:18 PM   #4
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Re: Evaluate integral

I reckon I am hard-headed. I type out the code. I tried the MathType, but when the trial ran out I just resorted to doing it by hand.
 
May 18th, 2009, 06:21 AM   #5
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Re: Evaluate integral

Quote:
Originally Posted by galactus
I reckon I am hard-headed. I type out the code. I tried the MathType, but when the trial ran out I just resorted to doing it by hand.
[color=#FF0000]EDIT:[/color] I had not realised I had logged in a long time back under "David", and then again, later, under "Dave". Same person if no-one can use the same names.

I used to type in DOS line commands and spend a day setting dip switches in a dot-matrix printer [shudder.] I LOVE GUI and Multitasking! Why not give the suggestions a try? The Lite version of MathType is used in Word and WordPerfect. I use it since I can then use it with the OpenOffice free suite for example, and also send stuff here [I have an extra step to get rid of the surrounding bracket-slash and replace with the Latex option given here, but that takes only a second.]

As is:

\[
\int\limits_{ - {\textstyle{\pi \over 2}}}^{{\textstyle{\pi \over 2}}} {\sin ^2 \theta d\theta }
\]

Changed:




From Hermitech Formulator [freeware]:

[attachment=0:3nlkxicl]Integral.jpg[/attachment:3nlkxicl]

The latter is a JPG image, but can be exported as XML and more. Hermitech is not as friendly as MathType though, and so not as useful.
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May 18th, 2009, 09:53 AM   #6
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Re: Evaluate integral

Thanks. That's right. I forgot Word supports LaTex. I will have to give it a whirl and get used to doing it that way instead of typing of the code.
 
May 18th, 2009, 05:11 PM   #7
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Re: Evaluate integral

Just one more quick note: Everything has a learning curve. Some get frustrated at first having to click some icon or drop-down list of icons for each and every step. Like typing, it takes time to become efficient [typing I never learned and never will], but it does become efficient. Also, if using MathType, check preferences/translators to decide which to copy for use in a word processor and which to post here for example.
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