Here's the triangle:

a=8

b=3

c=8

I did the law of cosines for C and got 0.1875. I did the arccos of that, and got 79.19°.

I then did the law of sines for A, and got 2.62444. I did the arcsin of that, and got undefined on my TI-89. I put arcsin(2.62444) in WolframAlpha and got -45.88°.

So... Am I doing something wrong?