Answer:
We found sinA= 3/5 and cosA=4/5
Option A is correct.
Step-by-step explanation:
The formula to find sin A is :

while the formula to find cos A is:

So, in the figure given:
Base = 16
Perpendicular = 12
Hypotenuse = 20
Now, finding sin A and cos A using formulas and above values


So, we found sinA= 3/5 and cosA=4/5
Option A is correct.