If \[{{\tan }^{-1}}(si{{n}^{2}}\theta -2sin\theta +3)+co{{t}^{-1}}({{5}^{{{\sec }^{2}}y}}+1)=\frac{\pi }{2}\], then the value of \[{{\cos }^{2}}\theta -\sin \theta \]is equal to

If \[{{\tan }^{-1}}(si{{n}^{2}}\theta -2sin\theta +3)+co{{t}^{-1}}({{5

1.	If \[{{\tan }^{-1}}(si{{n}^{2}}\theta -2sin\theta +3)+co{{t}^{-1}}({{5}^{{{\sec }^{2}}y}}+1)=\frac{\pi }{2}\], then the value of \[{{\cos }^{2}}\theta -\sin \theta \]is equal to
A.	0
B.	-1
C.	1
D.	none of these
Answer» D. none of these

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If \[{{\tan }^{-1}}(si{{n}^{2}}\theta -2sin\theta +3)+co{{t}^{-1}}({{5}^{{{\sec }^{2}}y}}+1)=\frac{\pi }{2}\], then the value of \[{{\cos }^{2}}\theta -\sin \theta \]is equal to

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