Q.

Let g:R(π/2,π/2) be given by g(u) =2tan1euπ/2,then g is

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a

odd and is strictly decreasing in (,)

b

neither even nor odd, but is strictly increasing in  (,).

c

even and is strictly increasing in (0,)

d

odd and is strictly increasing in (,)

answer is C.

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Detailed Solution

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    g(u)=2tan11euπ/2

   =2cot1euπ/2

   =2π/2tan1euπ/2

  =π/2tan1eu=g(u)

Also g(u)=2eu1+e2u>0uR

Thus g is an odd function which is strictly increasing on R.

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