# How do you Identify the point (x,y) on the unit circle that corresponds to t=-3.14/2?

##### 1 Answer

(x,y) coordinates of

#### Explanation:

The unit circle is used for both degree measure and radian measure. In this case,

Before we get to defining points on the unit circle in terms of radian measure, let's review the (x, y) coordinates of

At 0º, we know that

At 90º,

At 180º,

At 270º,

Now that we've reviewed those, we can start defining points on the unit circle. The difference between radians and degrees is that radians deal with the DISTANCE around the circle, while degrees deal with the MEASURE of the circle as it continues on.

We know that the circumference a circle is:

Since the unit circle has a radius of only one, a full revolution is

Now all we have to do is use that to find

We know that we if we divide

Also, we know that there are

When we solve that we get: