Question

Using the following triangle, what is the cosine of angle B?

Answer 1

cos(B) = a/c

Explanation:

The mnemonic SOH CAH TOA reminds you that ...

Cos = Adjacent/Hypotenuse

The leg adjacent to angle B is "a". The hypotenuse is "c", so the desired cosine is ...

cos(B) = adjacent/hypotenuse = a/c