Summary (Grade 11 NSC Matric Mathematics): Flashcards

$\cos^2 θ + \sin^2 θ = 1$

$\tan θ = \frac{\sin θ}{\cos θ}$

$-\sin θ$

$\cos θ$

$\cos θ$

Two angles & a side, or two sides & non-included angle

$\frac{1}{2}bc \sin A$

$a^2 = b^2 + c^2 - 2bc \cos A$

Sine only

$θ = \tan^{-1} x + k \cdot 180°$ where $k \in \mathbb{Z}$