If \[{{\tan }^{2}}\theta =2{{\tan }^{2}}\phi +1\],then \[\cos 2\theta +{{\sin }^{2}}\phi \]equals

If \[{{\tan }^{2}}\theta =2{{\tan }^{2}}\phi +1\],then \[\cos 2\theta

1.	If \[{{\tan }^{2}}\theta =2{{\tan }^{2}}\phi +1\],then \[\cos 2\theta +{{\sin }^{2}}\phi \]equals
A.	-1
B.	0
C.	1
D.	none of these
Answer» C. 1

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If \[{{\tan }^{2}}\theta =2{{\tan }^{2}}\phi +1\],then \[\cos 2\theta +{{\sin }^{2}}\phi \]equals

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