Learn how to evaluate for the secant of - 150 degrees

The video tutorial explains how to find the secant of -150 degrees by understanding its position on the unit circle and using reference angles. It covers the concept of reference angles, their consistency even with negative angles, and how to use the unit circle to determine coordinate points. The tutorial also demonstrates the calculation of secant for negative angles, including rationalizing the denominator.

What is the reference angle for 150 degrees?

• 60 degrees

• 30 degrees

• 45 degrees

• 90 degrees

Why is the reference angle important when determining coordinate points?

• It helps in identifying the coordinate points in the first quadrant.

• It is used to calculate the circumference of the circle.

• It helps in finding the length of the radius.

• It determines the quadrant of the angle.

What is the x-coordinate of the point corresponding to 30 degrees on the unit circle?

• sqrt 3 / 2

• -1/2

• 1/2

• -sqrt 3 / 2

How do you calculate the secant of an angle?

• 1 / Y-coordinate

• 1 / X-coordinate

• X-coordinate

• Y-coordinate

What is the final answer for the secant of -150 degrees after rationalizing the denominator?

• -sqrt 3 / 2

• sqrt 3 / 2

• 2 sqrt 3 / 3

• -2 sqrt 3 / 3