Learn How to Take the Inverse of Cosine to Evaluate

The video tutorial begins with a review of a previous problem statement and a recall of Algebra 1 concepts, specifically solving equations using inverse operations. The teacher then transitions to trigonometry, explaining how to solve trigonometric equations by using the inverse cosine function. The tutorial emphasizes understanding the unit circle and finding angles that produce specific cosine values, such as 1/2, using radians.

In Algebra 1, what operation is used to isolate the variable x in the equation x + 4 = 10?

• Addition

• Subtraction

• Multiplication

• Division

What is the inverse operation used to solve for an angle in trigonometry when given a cosine value?

• Inverse multiplication

• Inverse addition

• Inverse subtraction

• Inverse cosine

Which angle in radians corresponds to a cosine value of 1/2?

• pi over 6

• pi over 3

• pi over 2

• pi over 4

In the context of trigonometry, what is the equivalent of 60 degrees in radians?

• pi over 4

• pi over 3

• pi over 2

• pi over 6

When solving for an angle using the unit circle, which quadrants are typically considered for the angle pi over 3?

• First and fourth

• Third and fourth

• Second and third

• First and second