Find a Cartesian equation for the curve and identify it.

Question

r=5cscx

Answer 1

r = 5cscØ
r = 5/sinØ

we know that y/r = sinØ

or r = y/sinØ

then y/sinØ = 5/sinØ
y = 5 , a horizontal line

check:
http://www.wolframalpha.com/input/?i=polar+plot+r%3D5cscx

Answer 2

r = 5 cscθ
r sinθ = 5
y = 5