For this case we must indicate the cosine of A, of the figure shown. By definition:

Substituting the values we have:

So, we have to:

Answer:
Option D
You would multiply 4 on both sides
5x=2
then you would divide 5 on both sides
x=2/5
Answer:
27/64
Step-by-step explanation:
(7×16)+(5×64)64×16
=112+3201/024
=432/1024
Simplifying 432/1024, the answer is
=27/64
I will answer if u post the ?s in a coment