If \[\int{\frac{\cos 4x+1}{\cos x-\tan x}}dx=k\,\,\cos 4x+c\] then [DCE 2005]

If \[\int{\frac{\cos 4x+1}{\cos x-\tan x}}dx=k\,\,\cos 4x+c\] then �

1.	If \[\int{\frac{\cos 4x+1}{\cos x-\tan x}}dx=k\,\,\cos 4x+c\] then [DCE 2005]
A.	\[k=-1/2\]
B.	\[k=-1/8\]
C.	\[k=-1/4\]
D.	None of these
Answer» C. \[k=-1/4\]

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If \[\int{\frac{\cos 4x+1}{\cos x-\tan x}}dx=k\,\,\cos 4x+c\] then [DCE 2005]

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