Hi Guys,

I have a homework questions that I am stuck on, it's the last in the set and I can't do it!

It reads:

Prove that the meridians are geodesics when the curve: (x(u),0,u) is revolved around the z-axis.

I have an idea of using the Geodesic Curvature formula etc but do not know where to start.

If anyone could give me a hand, please let me know!

Cheers.

Patrick.