CUET Mathematics 2022 23 Aug Shift 1 PYQs

The domain of $y = \cos^{-1}(x^2 - 4)$ is

If R and S are two equivalence relations on a set A, then

Relation R on the set $A = \{1, 2, ..., 15\}$ defined as $R = \{(x, y): y - 4x = 0\}$ is