The solution of the differential equation \[\cos y\log (\sec x+\tan x)dx=\cos x\log (\sec y+\tan y)dy\] is [AI CBSE 1990]

\[{{\sec }^{2}}x+{{\sec }^{2}}y=c\]

The solution of the differential equation \[\cos y\log (\sec x+\tan x)

1.	The solution of the differential equation \[\cos y\log (\sec x+\tan x)dx=\cos x\log (\sec y+\tan y)dy\] is [AI CBSE 1990]
A.	\[{{\sec }^{2}}x+{{\sec }^{2}}y=c\]
B.	\[\sec x+\sec y=c\]
C.	\[\sec x-\sec y=c\]
D.	None of these
Answer» E.

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The solution of the differential equation \[\cos y\log (\sec x+\tan x)dx=\cos x\log (\sec y+\tan y)dy\] is [AI CBSE 1990]

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