Answer:
This is what i found hope it helps
Find the value of MN
In the right triangle MNL
Applying the Pythagorean Theorem
Solve for MN
in this problem we have
Substitute in the formula above
Step
Find the value of cos (M)
we know that
In the right triangle MNL
Substitute the value of MN
therefore
the answer is
The value of cos(M) is