Hi guys i tried to do this question but didnt work out.
http://prnt.sc/cdwvth
I tried doing (2nC2) where u choose 2 people out of 2n people for Pn but didnt know how to get Pn-1
thanks
Sorry I don't understand that. We haven't learnt about annulus yet. Also I don't understand how it got minimum range to be 30 or 60 degrees.
Whoops I just realised what annulus is sorry. But still don't get the minimum range bit.
Hey guys
So I don't know how to do this and I need help.
A gun can fire shells with speed "u" at elevations between 30 and 60 degrees. Find the area commanded by the gun on a horizontal plane, assuming that the gun can be rotated about vertical axis so as to point in any desired direction...