User:Fredrik/Tex

The equation $$n + 2 = \sqrt{2}$$

can be written inline, as can $$AX^2 + B = 0$$

. It was also known to Phenargus III of Sparta that $$\cos ij + \sin jk = \tan ijk$$

, although this is most probably fabricated. Further, $$e^{\log z} = z$$

for sufficiently finite $$z$$

. The equation $$n + 2 = \sqrt{2}$$

can be written inline, as can $$AX^2 + B = 0$$

. It was also known to Phenargus III of Sparta that $$\cos ij + \sin jk = \tan ijk$$

, although this is most probably fabricated. Further, $$e^{\log z} = z$$

for sufficiently finite $$z$$

.

Non-inline formulas:


 * $$\int e^{cx}\cos bx\; dx = \frac{e^{cx}}{c^2+b^2}(c\cos bx + b\sin bx)$$


 * $$\int_{-\infty}^{\infty} e^{-ax^2}\,dx=\sqrt{\pi \over a}$$

And some more maths:

The set of all irrational numbers $$\mathbb{R}-\mathbb{Q}$$

. And a real nifty function $$f : \mathbb{N} \to \mathbb{Z} : x \mapsto -x$$

which negates a natural number.

--R. Koot 02:18, 2 Jun 2005 (UTC)