Unit Circle and Trigonometric Functions

The video tutorial reviews the unit circle, focusing on special ordered pairs and quadrantal angles. It explains how to solve trigonometric problems using these concepts, including both direct and reverse problem-solving techniques. The tutorial emphasizes the importance of understanding the unit circle's properties and its application in evaluating trigonometric expressions.

What is the radius of the unit circle?

• 1

• 3

• 0

• 2

Which of the following is a special ordered pair on the unit circle?

• (2, 2)

• (0, 0)

• (1, 0)

• (1, 1)

What is the ordered pair for 45 degrees on the unit circle?

• (1/2, √3/2)

• (√2/2, √2/2)

• (1, 0)

• (0, 1)

What is the ordered pair for 30 degrees on the unit circle?

• (1, 0)

• (0, 1)

• (√3/2, 1/2)

• (1/2, √3/2)

What is the ordered pair for 60 degrees on the unit circle?

• (1, 0)

• (0, 1)

• (√3/2, 1/2)

• (1/2, √3/2)

What is the ordered pair for 90 degrees on the unit circle?

• (1/2, √3/2)

• (1, 0)

• (0, 1)

• (√3/2, 1/2)

What is the ordered pair for 0 degrees on the unit circle?

• (1, 0)

• (0, 1)

• (√3/2, 1/2)

• (1/2, √3/2)

What is the ordered pair for 180 degrees on the unit circle?

• (1/2, √3/2)

• (√3/2, 1/2)

• (0, 1)

• (-1, 0)

What is the ordered pair for 270 degrees on the unit circle?

• (√3/2, 1/2)

• (0, -1)

• (1, 0)

• (1/2, √3/2)

What is the ordered pair for 360 degrees on the unit circle?

• (1/2, √3/2)

• (0, 1)

• (1, 0)

• (√3/2, 1/2)