Revision Note - Math

1. $\sin\theta = \dfrac{b}{c}$
2. $\cos\theta = \dfrac{a}{c}$

1. $r=\sqrt{x^2+y^2}$
2. $\sin\theta = \dfrac{y}{r}$
3. $\cos\t

1. $\sin^2\theta+\cos^2\theta =1$
2. $\tan\theta=\dfrac{\s

$$\begin{array}{c|c|c|c|c|c}
& 0^\circ & 30^… Read