Question

Find the cosine of ∠V.
39
80
V
X
W
Simplify your answer and write it as a proper fraction, improper fraction, or whole number.
cos(V)=

Answer 1

I don't see the diagram, so I need one quick clarification: which side is adjacent to angle V — the side of length 39 or the side of length 80? Or is the right angle at V?

If the triangle is right and the legs are 39 and 80, then the hypotenuse is
sqrt(39^2 + 80^2) = sqrt(1521 + 6400) = sqrt(7921) = 89.

Then:
- If the side adjacent to ∠V has length 39, cos(V) = 39/89.
- If the side adjacent to ∠V has length 80, cos(V) = 80/89.
- If the right angle is at V, then cos(V) = 0.

Tell me which corresponds to your diagram and I will confirm the final answer.