Question

what is sin a? sin a = ?

Explanation:

Step1: Recall sine - ratio formula

The formula for $\sin$ of an angle in a right - triangle is $\sin\theta=\frac{\text{opposite}}{\text{hypotenuse}}$.

Step2: Identify opposite and hypotenuse for angle A

For angle $A$ in the given right - triangle, the side opposite to angle $A$ has length $13$ and the hypotenuse has length $16$.

Answer:

$\frac{13}{16}$