Question

How do you find the endpoint of the radius of the unit circle that corresponds 9π/2 radians?

Answer 1

First, convert `(9pi)/2` to less than `2pi`

Explanation:

`(9pi)/2-(8pi)/2=pi/2`

So, `(9pi)/2` is coterminal to `pi/2`

Now, `pi/2` is also `90^o` making the endpoint (0,1)

Hope that helped