Name: kishor
Who is asking: Student
Level of the question: Secondary

Question: What is the value of csc (-2pi/3)?

Thank you

 
Hi Kishor.

Here are some trig identities that will help get you started:
csc x = 1 / (sin x)
sin -x = - sin x

So csc (-2pi/3) = 1 / (-sin (2pi/3)).

Now you should be able to use your table of exact values to determine the rest.

Hope this helps,
Stephen La Rocque.