Question

Relate ratios in right triangles

Consider right triangle ADEF below. Which Expressions are equivalent to cos(E)?

Answer 1

B

Explanation:

Cos is the adjacent side over the hypotenuse. The adjacent side to <E is side ED. The hypotenuse is side EF. ED/EF. They do not go right out and give you this choice, but you see that B says the same thing.