Find the value the limits with cosine

The video tutorial explains how to replace X with 2 in the cosine function, focusing on the cosine of 2π/3. It discusses the coordinate points for π/3 and analyzes the second quadrant, where the cosine represents the X coordinate. The tutorial concludes by calculating the cosine value as -1/2.

What is the first step in evaluating the cosine of 2π/3?

• Find the tangent of 2π/3

• Find the sine of 2π/3

• Replace X with 2

• Replace X with 3

What is the coordinate point for π/3?

• (-1/2, -sqrt 3 / 2)

• (sqrt 3 / 2, 1/2)

• (1/2, sqrt 3 / 2)

• (-1/2, sqrt 3 / 2)

In which quadrant is the point 2π/3 located?

• Second quadrant

• First quadrant

• Fourth quadrant

• Third quadrant

What does the cosine function represent in terms of coordinates?

• X-coordinate

• Origin

• Y-coordinate

• Z-coordinate

What is the value of the cosine of 2π/3?

• sqrt 3 / 2

• 1/2

• -1/2

• -sqrt 3 / 2