Solving Tan(A) + tan(B) + tan(C)

[shinnsohai]

Recently My friend gave me a question about trigo

Homework Statement

How do I Solve This?
Tan(A) + tan(B) + tan(C)

On My Own Thought
Maybe I Think That The Question Is Quite Incomplete




2. The attempt at a solution

Any Idea To Start The Calculation?

 

[NascentOxygen]

Tan(A) + tan(B) + tan(C)
is not an equation, so has no "solution".

 

[eumyang]

Perhaps the question was something like this?
Prove that if A, B and C are the 3 angles in a triangle,
$\tan A + \tan B + \tan C = (\tan A)(\tan B)(\tan C)$

 

[NascentOxygen]

Perhaps the question was something like this?
Prove that if A, B and C are the 3 angles in a triangle,
$\tan A + \tan B + \tan C = (\tan A)(\tan B)(\tan C)$

If your hunch is correct, then I'm sure there will be plenty of solutions to be found by a google search.