Respuesta :

Chelboy

Answer:12.6

Step-by-step explanation:

Φ=57°

Hypotenuse=15

Opposite=x

SinΦ=opposite ➗ hypotenuse

Sin57=x ➗ 15

0.8387=x ➗ 15

Cross multiply

0.8387 x 15=x

12.6=x

x=12.6