The video tutorial explains how to evaluate inverse cosine function values using reference triangles and the unit circle. It covers finding angles corresponding to specific cosine values, such as -√3/2, √2/2, -1/2, and -1, within the interval from 0 to π radians. The tutorial uses reference triangles like 30-60-90 and 45-45-90 to determine angles in different quadrants and explains the use of the unit circle for specific cases.

What is the range of angles for the inverse cosine function?

• 0 to 2π radians

• 0 to π radians

• 0 to 3π/2 radians

• 0 to π/2 radians

Tags

CCSS.HSF.TF.B.7

Which angle corresponds to the inverse cosine of -√3/2?

• 120 degrees

• 150 degrees

• 60 degrees

• 30 degrees

Tags

CCSS.HSF.TF.B.7

In which quadrant is the angle for inverse cosine of -√3/2 located?

• Third quadrant

• Second quadrant

• Fourth quadrant

• First quadrant

Tags

CCSS.HSF.TF.B.7

What is the angle in radians for the inverse cosine of √2/2?

• π/6

• π/2

• π/4

• π/3

Tags

CCSS.HSF.TF.A.2

Which reference triangle is used for evaluating inverse cosine of √2/2?

• 30-30-120 triangle

• 60-60-60 triangle

• 45-45-90 triangle

• 30-60-90 triangle

Tags

CCSS.HSF.TF.B.7

What is the angle in degrees for the inverse cosine of -1/2?

• 120 degrees

• 150 degrees

• 90 degrees

• 60 degrees

Tags

CCSS.HSF.TF.B.7

In which quadrant is the angle for inverse cosine of -1/2 located?

• Fourth quadrant

• First quadrant

• Second quadrant

• Third quadrant

Tags

CCSS.HSF.TF.A.2

Which method is used to evaluate the inverse cosine of -1?

• Graph of sine function

• Graph of tangent function

• Unit circle

• Reference triangles

Tags

CCSS.HSF.TF.B.7

What is the angle in radians for the inverse cosine of -1?

• 3π/2

• 2π

• π

• π/2

Tags

CCSS.HSF.TF.B.7

What is the x-coordinate of the point on the unit circle for inverse cosine of -1?

• √2/2

• -1

• 0

• 1

Tags

CCSS.HSF.TF.B.7