Excuse the silliness of this question. It's been a wee while since I've done maths and I think I've forgotten something really basic.

Anyway, I've got to find the value of y= - cosec^2(pi.x) where x = 1/3

So far, I've gotten down to:

= - 1/sin(60)

Which, when banged into the calculator, = 1/ (square root)3/2 [if that makes sense].

But, I'm conscious of the squared sign in the cosec. Does that mean anything?