Which of the following statment does not hold good for the function f(x)=cos-1(2x2-1)?A)f is not differentiable at x=0B)f is monotonicC)f is evenD)f has an extremum
Which of the following statment does not hold good for the function f(x)=cos-1(2x2-1)?
A)f is not differentiable at x=0
B)f is monotonic
C)f is even
D)f has an extremum











