Q: If cosec 39°= x, the value of $$ {1\over {cosec^{2}{51°}}} +sin^{ – McqOptions

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1.	Q: 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. $$ {1-x^{2}}$$

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