Math Is Fun Forum

ninjaman

Member

Registered: 2013-10-15

Posts: 61

volumes of revolution

hello

i have a question

s = integration sign

s e^sinx cosx dx

i have

sinx = u

du/dx = cosx

then

s e^u du

du/dx = cosx

du = cosx dx

s e^u du

e^u +c

e^sinx +c

not sure if this is correct, i havent yet read about the latex thing.
any help

thanks
simon:)

Bob

Administrator

Registered: 2010-06-20

Posts: 10,630

Re: volumes of revolution

hi Simon,

Yes, that's correct! 

There's a full tutorial on Latex at

http://www.mathisfunforum.com/viewtopic.php?id=4397

Here's what you do:

There are two ways to find out new commands (apart from the tutorial)

One is to go to

http://latex.codecogs.com/eqneditor/editor.php

and construct what you want there.  Then you copy and paste the code between math brackets in your post.

Or, if you see someone's Latex and you want to see how they did it, just click on the Latex and the underlying code is shown.  You can copy that into your own posts.

Please give it a try;  it will make it so much easier to make sense of your posts. 

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob