If x,y , z are in AP and tan ^(-1) x, ...

If x,y , z are in AP and ` tan ^(-1) x, tan ^(-1) y and tan ^(-1) z `
are also in AP, then :

A

x= y = z

B

x= y = -z

C

x=1, y=2,z=3

D

x=2,y=4,z=6

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The correct Answer is:

A

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