Question

I have no idea how to solve this:
Determine the quadrant in which an arc of s=20 on the unit circle would terminate.

Answer 1

the first one

Answer 2

I mean the first quadrant

Answer 3

How did you get that?

Answer 4

I guess, hihihihi...

Answer 5

unit circle has radius 1, so that the perimeter is 2pi = 2*3.1415 = 6.283
so that each quadrant has the length 6.283/4 = 1.57075
and 20 = 3*6.283 + 1.151
That means I go around the circle 3 times and then go a 1.151 arc length. And this amount is at the first quadrant.
that's what I thought. Not sure whether it's valid or not.
@jim_thompson5910

Answer 6

thanks!!