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What is the solution of the differential...

What is the solution of the differential equation `3e^(x) tan y dx + (1 + e^(x)) sec^(2) y dy = 0` ?

A

`sin y = C (1 - e^(x))`

B

`cos y = C (e^(x) -1)`

C

`tan y = C ( e^(x) -1)`

D

None of these

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The correct Answer is:
D
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