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IF the tangent to the curve y= x ...

IF the tangent to the curve ` y= x + sin y ` at a point ( a, b) is parallel to the line joining `(0, 3/2) and ( 1/2 ,2)` then

A

`| a+ b|=1`

B

`|b-a|=1`

C

`b= pi/2 +a`

D

`b=a`

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