The measure of angle 0 is 3pi/2. the measure of its reference angle is pi/blank, and tan 0 is blank

If the measure of angle 0 is 3π/2, then the measure of its reference angle is π/2. This is because the reference angle is the acute angle formed by the terminal of the given angle and the x-axis. That is why the position of the terminal angle is 270° and between that and the x-axis is 90°.

This would be a reflection.