00:01
Hi, today in this video we will learn the concept of finding the determinant of a triangular matrix and we are given a matrix that is having the entries this one, the first one is 4, 0 and then 0, then we have 0 7, and then we have again 0 0 and then we have again 0 and minus 2.
00:28
So this is the triangular matrix we are given and we have to find the determinants.
00:33
Let's say i will give a name to this matrix as a now this is matrix a and it means that i have to find the determinant of a this one that is a determinant by which is represented by two vertical bars around it or we can also represent it by det of a that is the determinant of a which i have to find now as we know that the determinant of a a triangular matrix is simply the product of the increase of this principal diagonal.
01:07
We have to just multiply these principal diagonal increase.
01:12
And one thing is also important that this is us, you can see, this given matrix is a square matrix as number of rows which are simply the vertical sections, row one, you can say this is row two and this is row three.
01:28
And the horizontal article sections, this is column one, we call this a column two, and this is column three.
01:36
So three rows and three columns, they are equally to each other...
