The radian measure of 1.2 radians IS its own reference angle

Yes. Indeed it is correct.

To understand why the radian measure of 1.2 radians is its own reference angle, let's first define what a reference angle is. In trigonometry, a reference angle is the positive acute angle that is formed between the terminal side of an angle and the x-axis on the coordinate plane.

Now, let's consider an angle with a measure of 1.2 radians. In the standard position (where the initial side coincides with the positive x-axis), this angle would have its terminal side rotate counter-clockwise, forming an arc on the unit circle.

Since radians are a unit of measurement for angles, an angle of 1.2 radians is already measured in terms of the rotation it has made. Therefore, the reference angle for an angle of 1.2 radians is simply itself. In other words, 1.2 radians is already its own reference angle.

To summarize, the radian measure of 1.2 radians is its own reference angle because the angle is already measured in terms of the rotation it has made and does not require any additional calculations or adjustments.