00:01
So first thing, i'm going to draw my three quadrants.
00:05
Right? i want to find the six trigonometric values of theta, and my point is 5 negative 8, so x is 5 negative 8.
00:16
What i could do at this point is just create in the fourth quadrant, a right triangle.
00:21
My x distance is 5, my wide distance is negative 8.
00:25
And first thing i'm going to do is find my third side.
00:30
How do i find the third side of a right triangle? triangle.
00:32
Well, i know it's right triangle because x and y are perpendicular.
00:35
I use pythagrin theorem.
00:37
So one side squared plus the other leg squared, negative eight squared equals my hypotony squared.
00:42
Five times five is 25.
00:44
8 times 8 is 64.
00:47
24.
00:47
25 plus 64 is approximately 89.
00:52
Okay.
00:53
I could take the square root of both sides and i'm just going to leave it as the square root of 89.
01:00
Okay.
01:02
Hypotenuse will always be possible...