acsc (x)

Arc cosecant, inverse cosecant

This is the inverse function for csc (x) usually defined as :

for any x and y such that
(x <= -1 or x >= 1), (-pi/2 <= y <= pi/2 and y <> 0),
y = acsc(x) if and only if x = csc(y)

more info with wikipedia...

 

 

 

x  :  to     
y  :  to