The general solution of differential ...

The general solution of differential equation
` (dx) /( dy) = cos (x+y)` is

A

(a) `tan ((x+y)/2)=y+c`

B

(b) `tan ((x+y)/2)=x+c`

C

(c) `cot ((x+y)/2)=y+c`

D

(d) `cot ((x+y)/2)=x+c`

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The correct Answer is:

A

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