CUET Mathematics 2025 3 June Shift 1 PYQs

$\sin^{-1}(\cos\frac{3\pi}{5})$ equals

The relation R on the set of real numbers defined by $R = \{(a, b): a \leq b^2\}$ is

Let $A = \{1, 2, 3\}$. Then, the number of relations containing $(1, 2)$ and $(1, 3)$ which are reflexive and symmetric but not transitive, is