Answer:
Step-by-step explanation:
The Law of Cosines applying here is c^2 = a^2 + b^2 - 2ab*cos C.
Here c = 8 ft, b = 16 ft and a = 17 ft. Plugging these values into the above equation yields
8^2 = 17^2 + 16^2 - 2(17)(16)cos A, or
64 = 289 + 256 - 544*cos A, or
-481 = -544*cos A
Dividing both sides by -544 yields: cos A = 0.884
Using the inverse cosine function on a calculator, we get A = Y = 0.486 radians, or 27.8 degrees
