The value of the digit 8 is 8,000. To find the answer all you have to do is replace all the other numbers with zero. So 28,175 would be 08,000; and because a zero before a number doesn't mean anything, you end up with just 8,000.
Cosine is .
Apply the equation:
B is the adjacent side so
cosine is:
Cos(t) = 5/2
Have a great day,
And I hope this helps you!