Use sine ratio to calculate angles and side (Sin = $\frac{o}{h}$ )  Right Triangle Trigonometry
Use sine ratio to calculate angles and side (Sin = $\frac{o}{h}$ )
One of the trigonometric ratios is sine ratio. It is the opposite side over the hypotenuse of right triangles. In other words, we can find the angles and sides of rightangled triangles by using the sine ratios.
Related concepts:
 Law of sines
 Find the exact value of trigonometric ratios
 Unit circle
Lessons

a)
$\sin 60^\circ$

b)
$\sin60^\circ$


a)
$\sin \theta =0.57$

b)
$\sin \theta = 0.65$


4.
Determine the angles and sides using Sine ratio

5.
Draw and label a right triangle to illustrate sine ratio, then calculate the angle.