CBSE Class 12 Mathematics 2026 Main Paper 65(B) · Q111 Marksintegrating_factor CBSE Class 12 Mathematics 2026 Main Paper 65(B) · Question 11 (Differential Equations) Find the integrating factor for (1+y²)dx=(arctan y−x)dy. (A) tan y(B) arctan y(C) exp(arctan y)(D) exp(arctan x)