Question

find: sin a
answer
12/5 5/12 5/13 12/13

Explanation:

Step1: Recall the sine formula

$\sin A=\frac{\text{opposite}}{\text{hypotenuse}}$

Step2: Identify the sides

In right - triangle $ABC$ (right - angled at $C$), for angle $A$, the opposite side is $BC = 12$ and the hypotenuse is $AB=13$.

Step3: Calculate $\sin A$

$\sin A=\frac{12}{13}$

Answer:

$\frac{12}{13}$