Q. 47

Let f :R →< A. π/4


C. does not exist

D. none of these

Answer :

Given that, f (x) = tan x

Let f(x) = y

y = tanx

x = tan-1y

f-1(y) = tan-1y [ f(x) = y x = f-1(y) ]

f-1(x) = tan-1x

f-1(1) = tan-11

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