Solve, \(\tan y\frac{{dy}}{{dx}} + \tan x = \cos y.{\cos ^2}x\)

1
sec y ⋅ sec x = sin x + c
2
cosec y ⋅ tan x = cos x + c
3
sec y ⋅ sec x = cos x + c
4
cosec y ⋅ tan x = sin x + c

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