00:01
Vector is vector u and vector v.
00:03
Vector u is 0 minus 2 minus 2 and vector v is 0 2 and minus 2 we got to first sketch these two vectors so let's write that in another form which is minus 2 j and minus 2k and vector v will be 2 j minus 2k let's draw the axis so this one is y this one is x this one is x this one is z and this one will be minus z.
00:38
So this is x, y, z.
00:44
Now, when we draw minus 2 j minus 2k, so minus 2 j is towards the minus y axis, so it will come out over here.
00:54
And minus 2k will come out over here.
01:00
So the vector view, which is minus 2 j minus 2k, will be in the y z.
01:07
Plane so we can draw it somewhat like this it is coming out of the plane so this is vector u now vector v is also the same the only difference is the sign of the y is opposite to that of u so it's plus j so this will be this is plus y and this will be over here we have the minus z so this will come out somewhat like this.
01:41
So this is vector v.
01:43
Now we have to find the cross, the magnitude of the cross product of these two...