00:01
As a basic concept, when this problem is we have two vectors, say, vector a and vector b, vector a and vector b.
00:15
And the angle between them, then we have formalized here for that, cost theta is equal dot for a two vectors, a, dot b, all divided by the magnitude of a times magnitude of b.
00:28
That's a formula we're going to use here to find the angle between two vectors.
00:32
So we just find out that we have a is given as minus 5 minus 2 and vector b is given as 0 minus 4 that's given to us.
00:54
So now to find out angle between the 2, so we find like here cost theta, that's equal to a .b.
01:00
So find out a dot b.
01:02
So a dot b will be given as minus 5 times 0 plus we have minus 2 times minus 4.
01:12
So z .b, all divided by magnitude of a...