For this case we have to, by definition:

This means that, the cosine of the angle F, will be equal to the leg adjacent to the angle on the hypotenuse of the triangle.
So, by clearing h we have:

Rounding out the value of h we have:

Answer:
Option B
Answer:
Hi I really want to check my answer to this question, so if anyone could give it a try that would be very much appreciated!
Step-by-step explanation:
if this is wrogn sorry
4y^2 + 2 - 2 = 38 - 2 (subtract both side by 2)
4y^2 = 36
Divide by 4:
y^2 = 9
y = 
y = 3
The answer is b. subtract 3 from both sides