**(i)** y = (x^{3} – x) at x = 2

Consider y = (x^{3} – x) as the equation of curve

By differentiating both sides w.r.t x

**(ii) **y = (2x^{2} + 3 sin x) at x = 0

Consider y = (2x^{2} + 3 sin x) as the equation of curve

By differentiating both sides w.r.t x

**(iii) **y = (sin 2x + cot x + 2)^{2} at x = π/2

Consider y = (sin 2x + cot x + 2)^{2} as the equation of curve

By differentiating both sides w.r.t x