Thanks for help on formula

[Efrain R Portales <efrain12@xxxxxxxxxxxx>]

To the guys @ Equis:
thanks a lot for your time and dedication to help me out on this apparently
easy task. I had to make some
modifications, basically because for my research, I require the conditions
listed in my post ( C2>C1, C2>C, C>C1 ),
your formulas spot C1's with angles > and < 90 degrees regardless
of  their relative position with C2 and C. But hey, even so, it's
a very good help !.
Again, thanks for your help and technical support.
Regards,

Efrain R Portales