If cosec 39 = x, the value of $$ {1 over {cosec^{2}{51 }}} +sin^{2} 39^{ }+tan^{2}{51^{ }}-{1 over {sin^{2}{51^{ }}}{Sec^{2}{39^{ }}}}$$ is-

If cosec 39 = x, the value of $$ {1 over {cosec^{2}{51 }}} +sin^{2} 39

1.	If cosec 39 = x, the value of $$ {1 over {cosec^{2}{51 }}} +sin^{2} 39^{ }+tan^{2}{51^{ }}-{1 over {sin^{2}{51^{ }}}{Sec^{2}{39^{ }}}}$$ is-
A.	$$ { sqrt{x^{2}-1}}$$
B.	$$ { sqrt{1-x^{2}}}$$
C.	$$ {x^{2}-1}$$
D.	$$ {1-x^{2}}$$
Answer» D. $$ {1-x^{2}}$$