# Reference Triangle for csc(-150degrees)

• March 9th 2009, 06:30 AM
captaintoast87
Reference Triangle for csc(-150degrees)
I need to draw a reference triangle for csc(-150degrees) in order to find the exact value. I've drawn my triangle in the 3rd quadrant, but unsure of what the sides should be labeled as. Thanks!
• March 9th 2009, 07:14 AM
Quote:

Originally Posted by captaintoast87
I need to draw a reference triangle for csc(-150degrees) in order to find the exact value. I've drawn my triangle in the 3rd quadrant, but unsure of what the sides should be labeled as. Thanks!

$cosec(-150)=\frac{1}{sin(-150)}$

$=\frac{1}{-sin150}$

$=\frac{1}{-sin30}$

$=\frac{1}{-0.5}$

$
=-2
$