Question

In ΔDEF, the measure of ∠F=90°, the measure of ∠D=49°, and DE = 3.1 feet. Find the length of FD to the nearest tenth of a foot.

Answer 1

2.0

Explanation:

cos 49 = FD/3.1

FD = 3.1 cos 49 = 2.033 = 2.0