The function g is called the inverse of f and is denoted by f –1 Further, g is also
one-one and onto and inverse of g is f Thus, g–1 = (f –1)–1 = f We also have
(f –1 o f ) (x) = f –1 (f (x)) = f –1(y) = x
and
(f o f –1) (y) = f (f –1(y))  = f (x) = y
Since the domain of sine function is the set of all real numbers and range is the
closed interval [–1, 1]