Answer:
i) The order of matrix is 2 ×3
ii)The order of matrix is 3×3
- 3)A square matrix in which each diagonal element is unit ,all other element being zero is called a unit matrix. for example ..Unit matrix is given in figure.. 4 )(1 +tan^2A).cos^2A=1 next step sec^2A×cos^2A next step 1 i.e (1+tan^2A=sec^2A) and (sec^2×cos^2A=1)
