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

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

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

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

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