" If "f(x)=(x+1)tan^(-1)(e^(-2x))" ,then "f(0)" is equal to "

If f(x) = x tan^(-1)x , then f^(')(1) is equal to

If f'(x)=tan^(-1)x then f(x) is equal to ?

If f(x)=(log_(cot x)tan x)(log_(tan x)cot x)^(-1)+tan^(-1)((x)/(sqrt(4-x^(2)))) then f'(0) is equal to

If f (x) = sqrt((1+ sin ^(-1) x)/(1- tan ^(-1)x)), then f (0) is equal to :

If f (x) = sqrt((1+ sin ^(-1) x)/(1- tan ^(-1)x)), then f (0) is equal to :

If f (x)= sqrt((1+ sin ^(-1) x)/(1- tan ^(-1)x)), then f '(0) is equal to:

If f (x)= sqrt((1+ sin ^(-1) x)/(1- tan ^(-1)x)), then f '(0) is equal to:

Let f:R rarr [0, (pi)/(2)) be a function defined by f(x)=tan^(-1)(x^(2)+x+a) . If f is onto, then a is equal to