5
–1
2
5
3
5
7
i


+
−




= 







,  
3
1
3
C
cos
tan
sin
2
x
x
x
x
x


= +

+


In the above examples, the horizontal lines of elements are said to constitute, rows
of the matrix and the vertical lines of elements are said to constitute, columns of the
matrix Thus A has 3 rows and 2 columns, B has 3 rows and 3 columns while C has 2
rows and 3 columns 3 2