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The solution of (dy)/(dx) = cos (x + y )...

The solution of `(dy)/(dx) = cos (x + y ) + sin (x + y )`, is

A

`log [ 1 + tan ((x + y) /(2))] + C = 0`

B

`log [1 + tan ((x + y ) / (2))] = x + C`

C

`log [1 - tan ((x + y)/ (2))] = x + C`

D

None of the above

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The correct Answer is:
B
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