VOR cone of confusion

[John777]

I am preparing for my instrument checkride and I am still not sure why cone of confusion forms over the VOR.

Can anyone give me a brief explanation?

Thanks.
John.

 

[PeterNSteinmetz]

Interesting article in Wikipedia on this gimbal lock which notes that the term is used in applied mathematics, even when no classical mechanical gimbals are involved - https://en.m.wikipedia.org/wiki/Gimbal_lock