user:Jal

Computer science graduate student from Cambridge, England. Gaming journalist.

>> Using this as a testbed for some math formatting.

In this case, the cosine between items 1 and 2 is:

$\backslash frac\{(1,0,0)\backslash cdot\; (0,1,1)\; \}\{\; \backslash Vert\; (1,0,0)\backslash Vert\; \backslash Vert\; (0,1,1)\backslash Vert\; \}=\; 0$,

The cosine between items 1 and 3 is:

$\backslash frac\{(1,0,0)\backslash cdot\; (1,1,0)\; \}\{\; \backslash Vert\; (1,0,0)\backslash Vert\; \backslash Vert\; (1,1,0)\backslash Vert\; \}=\; \backslash frac\{1\}\{\backslash sqrt\{2\}\}$,

Whereas the cosine between items 2 and 3 is:

$\backslash frac\{(0,1,1)\backslash cdot\; (1,1,0)\}\{\; \backslash Vert\; (0,1,1)\backslash Vert\; \backslash Vert\; (1,1,0)\backslash Vert\; \}=\; \backslash frac\{1\}\{2\}$.