CLASS 12 MATHS CHAPTER 4-DETERMINANTS
Exercise 4.1 Solve The Following Questions. Evaluate the following determinants in Exercise 1 and 2. Question1. Solution : = 2(-1) – 4(-5) = -2 + 20 = 18 Question2. (i) (ii) Solution :(i) = (cosθ)(cosθ) – (-sinθ) (sinθ)= cos2 θ + sin2 θ= 1 (ii) = (x2 − x + 1)(x + 1) − (x − 1)(x + 1) = x3 − x2 + x + x2 − x + 1 − (x2 − 1) = x3 + 1 …