Learn how to use period as an aide to evaluate sine for a negative angle

The video tutorial covers the concept of periods and angles, focusing on rewriting angles greater than 2π with a denominator of 6. It explains how to calculate and verify angle values, specifically -23π/6, and introduces the concept of reference angles. The tutorial also discusses the unit circle, special right triangles, and how to use reflections to determine the positive or negative nature of angles in different quadrants.

What is the equivalent of 2π when expressed with a denominator of 6?

• 2π/6

• 6π/6

• 18π/6

• 12π/6

What is the reference angle for -11π/6?

• π/3

• π/4

• π/2

• π/6

What is the sine of the angle at π/6 on the unit circle?

• 0

• 1/2

• 1

• sqrt(3)/2

Which quadrant is associated with positive sine values?

• First

• Second

• Third

• Fourth

How can you determine the sign of a trigonometric function in a different quadrant?

• By using a calculator

• By memorizing all angles

• By using reference angles and reflections

• By using the unit circle