What is the Purpose of tg() in Physics?

[penguindecay]

Dear Physicists,

I've been given an equation tg(psi_1) = et cetera. I do not know the meaning of the tg function, please could could one tell me its formal name, or how it functions? Thank you

 

[arildno]

It's a fairly common abbreviation for the tangent function, at least in older books.

 

[penguindecay]

It's a fairly common abbreviation for the tangent function, at least in older books.

Thank you! It's the first time in fours years of higher education that I've seen it!

 

[arildno]

Thank you! It's the first time in fours years of higher education that I've seen it!

You're welcome!

And, to make a pre-emptive strike, lg() is an old convention for the (Briggs') logarithm..