Differenz zweier Quadrate
\[a^2-b^2=(a-b)(a+b)\]
Mathematisches Kurz-Nachschlagewerk in zwei Stufen: NMT-Prüfungsblatt und vollständige ZNO-Formelsammlung.
| α | 0° | 30° | 45° | 60° | 90° | 180° | 270° | 360° |
|---|---|---|---|---|---|---|---|---|
| sin α | \(0\) | \(1/2\) | \(\sqrt2/2\) | \(\sqrt3/2\) | \(1\) | \(0\) | \(-1\) | \(0\) |
| cos α | \(1\) | \(\sqrt3/2\) | \(\sqrt2/2\) | \(1/2\) | \(0\) | \(-1\) | \(0\) | \(1\) |
| tg α | \(0\) | \(1/\sqrt3\) | \(1\) | \(\sqrt3\) | \(\text{—}\) | \(0\) | \(\text{—}\) | \(0\) |