
Hello everyone!
Hello, My name is Martin, I'm from Czech republic. I study at High school. Math is my favourite subject. I hope I will learn something new at this forum :)
PS: May I ask you for send me a link for using latex. I used latex for many years at Czech math forum but here I have no idea..
$x^2+3x+9=0$
$3x^2+x$

Re: Hello everyone!
Hi. Something on this page should help. :)
LaTeX Help

Re: Hello everyone!
Welcome to Math help Forum! Here LaTeX don't work if you type with in $__$ sign. All codes are same just type using TEX and /TEX

Re: Hello everyone!
just testing:
$\displaystyle 5x^2$

Re: Hello everyone!
just testing 2:
$\displaystyle 2sin^2x+cos^2x+sinxcosx=1 $
$\displaystyle 2(1cos^2x)+cos^2x+sinxcosx=1$
$\displaystyle 22cos^2x+cos^2x+sinxcosx=sin^2x+cos^2x$
$\displaystyle 2cos^2x+sinxcosx=sin^2x+1sin^2x$
$\displaystyle 2(1sin^2x)+sinxcosx=1$
$\displaystyle 21+sin^2x+sinxcosx=1$
$\displaystyle 1+sin^2(x)+sinxcosx=1$
$\displaystyle sin^2x+sinxcosx+0$
$\displaystyle sinx(sinx+cosx)=0$
1. CASE
$\displaystyle sinx=0 $
$\displaystyle x=k*pi $
2. CASE
$\displaystyle sinx+cosx=0$
$\displaystyle \frac{sinx}{cosx}+1=0 $
$\displaystyle \frac{sinx}{cosx}=1 $
$\displaystyle tanx=1 $
$\displaystyle x_1=pi/4+k*pi$
$\displaystyle x_2=3/4pi+k*pi$

Re: Hello everyone!
they'll appear the same but proper syntax is \sin x, \cos x, \tan x etc.

Re: Hello everyone!
thanks for answer, but have you found any mistakes please?

Re: Hello everyone!
I didn't check, I thought you were just testing the LaTex...
You've got some unnecessary steps but you get the correct answer in the end.

Re: Hello everyone!
That's great, i am so grateful for you. Have a nice day