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

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?

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

eumyang
Homework Helper
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
Staff Emeritus
$\tan A + \tan B + \tan C = (\tan A)(\tan B)(\tan C)$