V= 15 steps are down below
ΔABC and ΔCBD are similar. Therefore we have the proportion:

Substitute:
<em>cross multiply</em>

Y=1x because if you draw it on the line you’ll see the linear variation
Answer: 15
Step-by-step explanation:
We know that sin 75 degrees = 0.90659...
Now, to find cos: cos-1 (0.90659) = 15
So the answer is 15.