00:01
So they tell you that t is bigger than pi over two and then smaller than pi.
00:06
So we're over here.
00:09
And so what matters to me is that when they say sine of t equals root two over seven, well then right here is where t is.
00:20
It doesn't really look like a t, more like a plus sign.
00:22
But sine is opposite over hypotenuse.
00:27
So the opposite side is root two, the hypotenuse is seven.
00:31
And you can use the pythagorean theorem like this.
00:35
I'm going to call this sine length x.
00:37
X squared plus the other leg squared equals seven squared.
00:43
So they're looking at x squared root two squared is just regular two because it's the square root of four, which is two, equals forty nine, which then tells me that x squared would equal forty seven.
00:55
And that x is the square root of forty seven.
00:58
Now notice where it's located right here...