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## Discussion of Problem 1030. Titanic

Is this equation correct !? Or I should use other one!?
Posted by Krzysztof Kapuscik 27 May 2001 05:58
I've got several WA on this problem. Could somebody tell me
if I should use this equation to count :

angle = acos(cos(as)*cos(bs)*cos(ai)*cos(bi)+cos(as)*sin(bs)
*cos(ai)*sin(bi)+sin(as)*sin(ai));

where as,bs are altitude and longitude of ship, and ai,bi
of iceberg ???

And could I use this:
ang2 = [ ( (secs/60)+mins )/60 + hrs ] * PI/180
to get the radian angle from given coordinates (hh^mm'ss'')

Please help!??!
Re: Is this equation correct !? Or I should use other one!?
Posted by cosechy 4 Sep 2004 14:44
My answer:
6875*asin(sqrt((1-cos(x)*cos(a)*cos(y-b)-sin(x)*sin(a))/2))
x,y are the ship's coordinates, and a,b are the iceberg's.
Re: Is this equation correct !? Or I should use other one!?
Posted by remdy21 7 Aug 2009 10:14
i think it's right ,but my sample ans is 52.14
WHY?????????????