D )
Rationalised 2023-24
INVERSE TRIGONOMETRIC FUNCTIONS     19
We have also learnt in Chapter 1 that if f : X→Y such that f (x) = y is one-one and
onto, then we can define a unique function g : Y→X such that g(y) = x, where x ∈ X
and y = f (x), y ∈ Y Here, the domain of g = range of f and the range of g =  domain
of f The function g is called the inverse of f and is denoted by f –1