you should draw a diagram and fill in what you know. ordinarily i would, but i'm not in the mood right now.

let's find the hypotenuse first.

By Pythagoras' Theorem:

where is the length of the hypotenuse

Now the smallest angle will be opposite the smallest side, that means it will be adjacent to the longest side (other than the hypotenuse). that means is the anjacent side to