What is a unit circle basics

The video tutorial introduces the concept of the unit circle, explaining angles, rotations, and the significance of radians and pi. It defines the unit circle as a circle with a radius of 1, highlighting key points on the circle and their coordinates. The tutorial emphasizes understanding the basics of the unit circle, setting the foundation for further exploration of its properties.

What is the radian measure equivalent to a 180-degree angle?

• 3 radians

• 2 pi radians

• pi radians

• 1 radian

What is the complete radian measure for a full circle rotation?

• 3 pi radians

• pi radians

• 2 pi radians

• 1 radian

What is the radius of a unit circle?

• pi

• 2

• 1

• 0

Which of the following is a point on the unit circle?

• (0, -2)

• (0, 2)

• (1, 0)

• (2, 0)

What are the coordinates of the point on the unit circle at the top of the y-axis?

• (0, -1)

• (-1, 0)

• (1, 0)

• (0, 1)