00:01
Okay, arc sine 0 means the angle through sign is 0, and that is simply 0 degrees, or 0 radiance.
00:10
So the first one is just 0.
00:13
Now, the next one, i can write this as arc tan 1 over root 3.
00:21
Same thing.
00:23
If i times top and bottom by root 3, that's the end result.
00:27
That comes from this triangle, which is 1, 2, root 3.
00:35
3.
00:36
And here is 60 degrees.
00:40
Here is 30 degrees.
00:41
So 60, 30, 90 triangle, 1, 2, root 3.
00:45
It's very common in math.
00:48
Triangle off by heart.
00:51
So for here then, the angle whose tan is 1 over root 3 will be 30 degrees here.
00:58
Tan 30, 1 over root 3...