Select the correct options from the give...

Select the correct options from the given alternatives.If`tanA-tanB=x`and `cotB-cotA=y`then`cot(A-B)=`……….

A

`(1/y)-(1/x)`

B

`(1/x)-(1/y)`

C

`(1/x)+(1/y)`

D

`(frac(xy)(x-y))`

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