Question

Write the domain of f(x) = cos-lx​

Answer 1

Answer:

Given f(x)=cos

−1

x

The domain of f(x) is equivalent to the range of values of x for which f(x) exists

Let f(x)=θ , we get x=cosθ

The range of cosθ is [−1,1]

Therefore the range of x is [−1,1]

Hence, the domain of f(x) is [−1,1].please mark me as a brainlist