# Trigonometry help plz!!!

• November 10th 2009, 09:47 AM
Trigonometry help plz!!!
the question says:

Given that arctan(x-2)= -π/3 find the value of x.

I have no clue what to do...I'v tried tanx=x-2=-π/3 ..but it doesn't really make sense:confused:
• November 10th 2009, 10:30 AM
masters
Quote:

the question says:

Given that arctan(x-2)= -π/3 find the value of x.

I have no clue what to do...I'v tried tanx=x-2=-π/3 ..but it doesn't really make sense:confused:

$\arctan x = y$ means $x = \tan y$

$\arctan (x-2)=-\frac{\pi}{3}$ means $x-2=\tan -\frac{\pi}{3}$

$x=\tan\left(-\frac{\pi}{3}\right)+2$
• November 10th 2009, 10:39 AM
$\arctan x = y$ means $x = \tan y$
$\arctan (x-2)=-\frac{\pi}{3}$ means $x-2=\tan -\frac{\pi}{3}$
$x=\tan\left(-\frac{\pi}{3}\right)+2$