SATmath4u.com is the first forum introducing the addition of LaTeX mathematical typesetting for SAT math test.
LaTeX is a professional-grade general typesetting system that centers around very pleasing mathematical presentation. Mathematical expressions are written in a markup style somewhat similar to HTML.
You may include LaTeX graphics in any post here on SATmath4u.com
To include a LaTeX graphic, simply include your LaTeX code within the tags [tex][ /tex]. without spaces.
Or by using the rightmost button in editing bar and then use the math symbols bellow the post area as shown in the following image.

Basic Guidelines
Lines and Text. \\ starts a new line, \ includes a space, \mbox{...} includes text
Sub- and Superscripts. produces
while produces
Here is another example:
Code:
[tex]\log_{5} 125=3[ /tex]
gives 
Fractions. Use \frac to display fractions.
Example:
Code:
[tex]\frac{\pi^2}{6}[ /tex]
gives
.
Roots. Use \sqrt. For instance,
Code:
[tex]\sqrt{a^3+b^4}[ /tex]
produces 
You can also get “other” roots:
Code:
[tex]\sqrt[4]{5}[ /tex]
yields
.
Various examples
Code:
Code:
[tex] \frac{1}{2^n} \rightarrow 0[ /tex]
produces the graphic 
Code:
Code:
[tex]\int_a^b f(t) dt = 1[ /tex]
produces the graphic

Code:
Code:
[tex] \sum_{n=0}^{\infty} \frac{1}{n!} = e [ /tex]
produces the graphic

Plus or minus
produces the graphic

multiplication or dot product
Code:
[tex]a\cdot b[ /tex]
produces the graphic

Equals sign and inequalities
To get an equals sign, you simply use the ordinary = sign.
produces the graphic
For 'not equal to', use \not=
Code:
[tex]2^4\not=2[ /tex]
produces the graphic

For less than signs, we use <, and for greater than signs, we use >
For 'less than or equal to' signs, we use \leq, and for 'greater than or equal to' signs we use \geq
Code:
[tex]x^2 \geq 0[ /tex]
produces the graphic

For spaces, use "\ ".
Sigma notation
To write sums, we use the \sum command.
Code:
[tex]\sum_{i=1}^n i^2 = \frac{1}{6}n(n+1)(2n+1) [ /tex]
produces the graphic

Differentiation
We use \frac{}{} to write dy/dx.
Code:
[tex]\frac{d}{dx} x^4 = 4x^3[ /tex]
produces the graphic
For f'(x), simply write it out normally within TeX tags.
produces the graphic

Integration
For the integral sign, use the \int command.
Code:
[tex]\int 3x^2\ dx = x^3 + C[ /tex]
produces the graphic
For definite integrals, use the commands for subscripts and superscripts.
Code:
[tex]\int^1_0 x\ dx =0.5[ /tex]
produces the graphic

Modulus sign or absolute value
Use | for the modulus sign.
Code:
[tex]\sqrt{x^2} = |x|[ /tex]
produces the graphic
Factorial
Use the exclamation mark like normal.
produces the graphic
n choose r
Code:
[tex]^n\mathrm{C}_r[ /tex]
produces the graphic
Greek Letters
Write \x where x is the written form of the Greek letter (i.e. alpha, beta, gamma, ... , omega).
produces the graphic

produces the graphic
Infinity
To insert the infinity symbol, use \infty.
produces the graphic
Trigonometry
Code:
[tex]\cos \theta[ /tex]
produces the graphic
Code:
[tex]\sin \theta[ /tex]
produces the graphic
Code:
[tex]\tan \theta[ /tex]
produces the graphic
Code:
[tex]\sec \theta[ /tex]
produces the graphic
Code:
[tex]\mathrm{cosec} \theta[ /tex]
produces the graphic

Code:
[tex]\csc \theta[ /tex]
produces the graphic
Code:
[tex]\cot \theta[ /tex]
produces the graphic

Code:
[tex]\sin^2 \theta + \cos^2 \theta=1[ /tex]
produces the graphic

To write 'degrees', you could use the \circ command.
Code:
[tex]\cos 60^{\circ} = \frac{1}{2}[ /tex]
produces the graphic

Logarithms
Code:
[tex]\ln x^5 = 5 \ln x[ /tex]
produces the graphic

Code:
[tex]\log_{10} x^2 = 2 \log_{10} x[ /tex]
produces the graphic

Matrices
Code:
[tex]\begin{pmatrix} -2 & 6 & 7 \\2 & -5 & 1 \\1 & 2 & 3 \end{pmatrix}[ /tex]
produces the graphic

Determinants
Code:
[tex]\begin{vmatrix} -2 & 6 & 7 \\2 & -5 & 1 \\1 & 2 & 3 \end{vmatrix}[ /tex]
produces the graphic

vectors, simply write a matrix with only one column:
Code:
[tex]\begin{pmatrix} x \\ y \\ z \end{pmatrix}[ /tex]
produces the graphic

Code:
[tex]\vec{a}[ /tex]
produces the graphic
Limits
Code:
[tex]\displaystyle\lim_{x\to 0}[ /tex]
produces the graphic

Sets
produces the graphic
produces the graphic
Code:
[tex]\subset[ /tex]
produces the graphic
Code:
[tex]\subseteq[ /tex]
produces the graphic
Code:
[tex]\nsubseteq[ /tex]
produces the graphic
produces the graphic
Code:
[tex]\not\in [ /tex]
produces the graphic
Code:
[tex]\mathbb{P}[ /tex]
produces the graphic
Code:
[tex]\mathbb{N}[ /tex]
produces the graphic
Code:
[tex]\mathbb{Z}[ /tex]
produces the graphic
Code:
[tex]\mathbb{I}[ /tex]
produces the graphic
Code:
[tex]\mathbb{Q}[ /tex]
produces the graphic
Code:
[tex]\mathbb{R}[ /tex]
produces the graphic
Code:
[tex]\mathbb{C}[ /tex]
produces the graphic
Code:
gives
produces the graphic
Logic Symbols
Code:
[tex]\forall[ /tex]
produces the graphic
produces the graphic
produces the graphic
Code:
[tex]\exists[ /tex]
produces the graphic
produces the graphic

produces the graphic
Bookmarks