7 Answers
xYz
·2009-10-08 02:36:36
sir
answer is (x,y belong to (0,pi/2)U(pi,3pi/2))....
to generalise we can add 2npi..
Lokesh Verma
·2009-10-08 08:34:57
x=3/4 pi and y = pi/2 seem to satisfy..
but you have not plotted that point!