The central pole forms a right triangle with the floor of the tent. The [sine] of the missing angle is the...

The central pole forms a right triangle with the floor of the tent. The [sine] of the missing angle is the ratio of the length of the central pole to the length of the side of the tent, which is [Choose an answer]. Applying [Choose an answer], we find that the angle the tent pole makes with the sides of the tent is [Choose an answer].