# Math Help - Showing that a function is odd

1. ## Showing that a function is odd

Show that tan x is an odd function: tan (-x) = - tan x?

Not sure how to do this, help would be much appreciated

2. Of course is $\tan x = \frac{\sin x}{\cos x}$ ... $\sin x$ is an odd function and $\cos x$ an even function... what about the ratio?...

Kind regards

$\chi$ $\sigma$

3. Originally Posted by brumby_3
Show that tan x is an odd function: tan (-x) = - tan x?

Not sure how to do this, help would be much appreciated
What definition of tan are you working with?

CB