1.

The range of the function, `f(x)= (1+sec^-1x) (1 + cos^-1 x)` isA. `(-oo,oo)`B. `(-oo,0]uu[4,oo)`C. `{1,(1+pi)(2)}`D. `{0,(1+pi^(2))}`

Answer» Correct Answer - C
Domain of `f(x)` is `{1,-1}` so range will be `f(1)` & `f(-1)`


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