# spherical triangle problem

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• January 10th 2012, 07:57 AM
corsica
[solved] spherical triangle problem
This is not a homework problem, it's part of a practial engineering problem that I'm trying to solve. I have been struggling with it for a few hours already. I know I should use the Napier rules, but somehow I can't figure it out yet.

I've got a right spherical triangle in which angle A and side c are known. What is the formula for side b?

http://upload.wikimedia.org/wikipedi...iangle.svg.png
• January 10th 2012, 08:30 AM
corsica
Re: spherical triangle problem
Ok, after some more digging through the internet I think I managed to find the solution:
$\tan(b)=\tan(c)\cos(A)$

Everyone thanks for reading and thinking about this nevertheless!