Showing that a function is odd

**brumby_3** · March 31st 2011, 10:34 PM

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

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

**chisigma** · March 31st 2011, 10:38 PM

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

$\chi$ $\sigma$

**CaptainBlack** · March 31st 2011, 11:19 PM

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

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