Assertion (A): A function \( y=f(x) \) is defined by \( x^{2}-\cos ^{-1} y=\pi \), then domain o...

Assertion (A): A function \( y=f(x) \) is defined by \( x^{2}-\cos ^{-1} y=\pi \), then domain of \( f(x) \) is \( R \)
Reason (R): \( \cos ^{-1} y \in[0, \pi] \)
(A) Both A and R are true and R is the correct explanation of A.br(B) Both A and R are true, but R is not the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.
(E) Both A and R are false.