Learn how to evaluate for the secant of a negative angle using the unit circle

The video tutorial explains how to understand and visualize angles and reference angles using the unit circle. It covers the concept of reflecting angles about the axes and calculating the secant of an angle. The tutorial emphasizes the importance of understanding these concepts without always relying on the unit circle.

What is the reference angle for 150 degrees?

• 120 degrees

• 90 degrees

• 30 degrees

• 60 degrees

How is the angle of 150 degrees represented on the unit circle?

• No reflection

• Reflection about the X-axis

• Reflection about the Y-axis

• Reflection about both X and Y axes

What is the X-coordinate of the angle 150 degrees on the unit circle?

• -1/2

• 1/2

• sqrt 3 / 2

• -sqrt 3 / 2

What is the formula for secant of an angle?

• X / Y

• Y / X

• 1 / X

• 1 / Y

What is the simplified form of the secant for the angle with X-coordinate -sqrt 3 / 2?

• -2 sqrt 3 / 3

• 2 sqrt 3 / 3

• -sqrt 3 / 2

• sqrt 3 / 2