$$\sin\ \alpha\ =\frac{\text{BC}}{\text{AB}}$$  

$$\cos\ \beta=\frac{\text{BC}}{\text{AC}}$$  

$$\sin\ \beta=\frac{AC}{AB}$$  

$$\cos\alpha=\frac{AC}{AB}$$   

$$\frac{BC}{AB}$$  

$$\frac{AC}{BC}$$  

$$\frac{BC}{AC}$$  

$$\frac{AB}{AC}$$  

sisi depan sudut berbanding sisi miring

sisi miring berbanding sisi samping sudut

sis disamping sudut berbanding sisi didepan sudut

sisi depan sudut berbanding sisi disamping sudut

$$\frac{1}{2}$$  

$$\frac{1}{3}\sqrt[]{3}$$  

$$\frac{1}{2}\sqrt[]{3}$$   

$$\sqrt[]{3}$$  

$$\frac{5}{4}$$  

$$\frac{5}{3}$$  

$$\frac{3}{4}$$  

$$\frac{4}{5}$$