Points on a unit circle ?
What are the points that lie on a unit circle for the following angles?
1. 220 degrees
2. 120 degrees
Please teach me the answers and the way to find it.
- ?Lv 71 month ago
Found this on https://etc.usf.edu/clipart/43200/43216/unit-circl...
- hayharbrLv 71 month ago
The point's x coordinate is the cosine of the angle, and the point's y coordinate is the sine.
So, (cos 220, sin 220)
(cos 120, sin 120)
Cos 7π/4, sin 7π/4)
etc. If it's one with an exact value, you could simplify. Like, you know sin 120 = (√3)/2 and cos 120 = - 1/2
so #2 would become (-1/2 , √3 / 2)