Question

How do you find the coordinates of the terminal points corresponding to the following arc length on the unit circle: -9π/-4?

Answer 1

`(sqrt2/2, sqrt2/2)`

Explanation:

Arc: `(-9pi)/-4 = (9pi)/4 = pi/4 + (8pi)/4 = pi/4 + 2pi`
The coordinates of the terminal points are:
`x = cos (pi/4) = sqrt2/2`
`y = sin (pi/4) = sqrt2/2`