12th Maths Solutions – Chapter-wise Answers (Samacheer Kalvi Guide)

2 Marks Important Questions

Adjoint || A Inverse || Orthogonal Matrix || Find The Rank

• Ex1.1 : (Adjoint , A inverse based questions) 1,2,9,(Very Important)10 + Example (Adjoint ,A inverse)
• Example : 1.11 Pg13 (Orthogonal Matrix – Very Important)
• Ex1.2 : Q1 || Example 1.15 & 1.16 pg 20 & 21 :Rank minor method
• Example 1.4 (Pg9)(public exam 2026)

3 Marks Important Questions

Rank Row Reduction || Test for consistency || Matrix Inversion

• Ex1.2 : 2nd sum : Find the Rank Row reduction method
• Ex1.6 : 1st sum : Test for consistency
• Ex 1.7 : 2nd sum : Non – trivial solution
• Ex1.1 : Ex1.8 Pg10 (3,7,9,10,15)
• Ex1.3 : Matrix inversion method

5 Marks Important Questions

• Ex1.4 – 1st(iv),2,3,4,5 + Example (CRAMMERS Rule) : Ver Important
• Ex1.6 – 2nd , 3rd , || Ex 1.7 – 2nd & 3rd & Example (FIND THE VALUES OF LAMDA , µ ) Important
• Ex1.5 – Gaussian Ellimination – Less Important
• Ex 1.3 : Matrix Inversion method || Ex 1.1 : 5th sum Important (All big sums) Less Important