Mathematics Inverse Trigonometric Functions 1 Mark Appeared in: 2025 (3 sets) If $\tan^{-1} (x^2 - y^2) = a$, where 'a' is a constant, then $\frac{dy}{dx}$ is : (A) $\frac{x}{y}$ (B) $-\frac{x}{y}$ (C) $\frac{a}{x}$ (D) $\frac{a}{y}$