Answer:
[tex]\frac{-2}{\sqrt{3} }[/tex]
Step-by-step explanation:
Cosec of -120 is to be found out
We can do this in steps
cosec (-120) consider only the - sign.
This implies angle lies in IV quadrant and hence cosec is negative
cosec (-120) =-cosec (120)
Now 120 is written as 180-60
cosec (-120) =- cosec(180-60)
=-cosec 60
(since II quadrant cosec is positive)
= [tex]\frac{-2}{\sqrt{3} }[/tex]
