How solve this trigo system ?

[Gerson W. Barbosa]

(09-18-2017 10:45 AM)ggauny@live.fr Wrote:  Thank Gerson,

So it is no one command which give the answer.

I lack too much mathematics to find like this !

You're welcome!

I think both the Prime and 50g can solve this, but that was what I could do without reading the manual. Other trigonometric identities might give better solutions.

Gerson.