144 - 56 = 88
88/144 simplified to -----> 11/18
The given triangle is a right angle .
In this triangle for angle A side AC is adjacent side ,BC is opposite side and AB is hypotenuse.
Sin of any angle is the ratio of opposite and hypotenuse .

Substituting the values of opposite and hypotenuse
SinA=
Answer:

Step-by-step explanation:

-0.25 I fell that this is the answer because it is the only one that would make sense