math

I have been hitting myself over the head for a couple hours now. I am trying to calculate the new latitude & longitude (position) when all I have is old latitude & longitude, distance traveled and direction. The formula I found online is: 'lat2 = asin(sin(lat1)*cos(d/R) +...

I have been over my code several times, but I just cant seem to find the error. It is supposed to be a simple triangle calculator (actually a control for a much bigger project) that solves for any missing parts. This is the SSS (Side-Side-Side) portion of it that does not work... Public...