Question

Referring to the Fig. in Question #44, find the cosine of
∠A. Give answer in simplest form.

Answer 1

we know that the total in agles of all trianges is 180, so we can see that c is already a 90 degree angle this only leaves 90

Explanation:

Answer 2

we know that the total in agles of all trianges is 180, so we can see that c is already a 90 degree angle this only leaves 90