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The function (sin(x+a))/(sin(x+b)) has n...

The function `(sin(x+a))/(sin(x+b))` has no maxima or minima if

A

`b-a=npi, n in I`

B

`b-a=(2n+1)pi, n+I`

C

`b-a=2npi, n in I`

D

None of these

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The correct Answer is:
A, B, C
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