unit circle

This is the Unit Circle with θ increments of 15 degrees. Use the applet to answer the questions below.

1. Fill in the blanks.

Angle	x- coordinate	y-coordinate	The ratio of y-coordinate to x-coordinate
30˚
60˚
90˚
120 ˚
165 ˚
225 ˚
255 ˚
315 ˚
330 ˚

2. Find the possible values of the ratio of y-coordinates to x- coordinates for the following angles.

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