# Thread: Reference Triangle for csc(-150degrees)

1. ## 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!

2. 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
$