The video tutorial explains how to evaluate the angle Theta when the secant of Theta equals -1. It begins by discussing the relationship between secant and cosine, noting that secant is the reciprocal of the cosine function. The tutorial then guides viewers through finding the angle on the unit circle where the cosine equals -1, which corresponds to the angle π. The video concludes by emphasizing that the angle must be between 0 and 2π.

What does the secant of an angle represent in terms of the unit circle?

• The y-coordinate

• One over the x-coordinate

• The x-coordinate

• One over the y-coordinate

When the secant of Theta is -1, what is the value of the x-coordinate?

• 1

• Undefined

• 0

• -1

What is the relationship between cosine and the x-coordinate on the unit circle?

• Cosine is the y-coordinate

• Cosine is the angle

• Cosine is the radius

• Cosine is the x-coordinate

At which angle does the cosine of Theta equal -1 on the unit circle?

• 0

• 2π

• π/2

• π

Why can't the angle Theta be outside the range of 0 to 2π?

• Because the unit circle only covers this range

• Because it would make the secant undefined

• Because angles outside this range are not defined

• Because it would result in a negative radius