Solve 2012 CBSE-Mathematics Question Paper (Set-3) given here.
1. a * b = a + b - 5, then write the identity element for the operation * in Z.
2. Write the value of cot (tan-1 a + cot-1 a).
3. If A is a square matrix such that = A, then write the value of (I + A)a - 3A.
4. Write the direction cosines of a line parallel to z-axis.
To get complete question paper Click Here