00:01
So we'd like to match the vector fields with the plots labeled here.
00:05
We have the sine y, cosine x.
00:08
So that means we expect whenever y is equal to 0, we have sine y equals 0.
00:16
So along the x -axis, all of the direction should be going in.
00:24
The x should be 0, and everything should be vertical at the x -axis.
00:29
So it's definitely not this one.
00:32
And we're different just on that thing.
00:37
Okay, great.
00:38
Also, when x equals 0, we have cosine x equals 1.
00:43
So it should be going up along the entire y -axis.
00:49
It's not that.
00:50
This looks like it's horizontal on the y -axis...