How do I find the correct answer? ( the top says "Triangles ABC and DEF are right triangles, as shown, ABC is similar DEF.)

Question

asked Apr 15, 2023 78.9k views

1 Answer

Pycm · Answer 1 · 2023-04-19T23:40:42+0000

The cosine relation is defined by the length of the adjacent side over the length of the hypotenuse.

So, for triangle ABC, the cosine of B is defined as:

$\cos (B)=(BC)/(AB)$

And for triangle DEF, since the triangles are similar, the cosine of B is equal the cosine of its corresponding angle E:

$\cos (E)=(EF)/(DE)$

So the correct options are the first and fifth ones.