w=125/(cotA+cotB)

Answer 1

I can't really help you... but I know who can! I can't submit the URL but google the question and it should be at the top as a youtube video, hope this helps.

Answer 2

You have a nice equation. Is there something we're supposed to do with it?

As I recall, w represents the width of a river, and you have the angles at A and B. What is there that you cannot do? Just plug in the values of A and B, and the evaluate the numbers to get w!

Answer 3

fine. thanks by the way steve.

Answer 4

thanks for the suggestion sockmaster (opinion based answers)