If tan = 2, then the value of $$ {cosec^2 - sec^2 } over{cosec^2 + sec^2 } $$ is :

If tan = 2, then the value of $$ {cosec^2 - sec^2 } over{cosec^2

1.	If tan = 2, then the value of $$ {cosec^2 - sec^2 } over{cosec^2 + sec^2 } $$ is :
A.	$$ -{15 over 9} $$
B.	$$ {3 over 5} $$
C.	$$ -{3 over 5} $$
D.	$$ {17 over 5} $$
Answer» D. $$ {17 over 5} $$