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0 < a < b < ( pi/2​) and f(a,b)= (tanb−...

0 < a < b < ( pi/2​) and f(a,b)= (tanb−tana)/b-a

A

`f(a,b)ge2`

B

`f(a,b)gt1`

C

`f(a,b)le1`

D

none of these

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The correct Answer is:
B
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