Answer:
The answer is B.
Step-by-step explanation:
We can use right triangle ratios.
Recall SohCahToa, where:
[tex]\displaystyle \sin(A)=\frac{\text{opposite}}{\text{hypotenuse}}[/tex].
The opposite side (to angle A) is 8, while the hypotenuse is 10.
Thus, we have:
[tex]\sin(A)=8/10=4/5[/tex]
The correct answer is B.
