Evaluate the Inverse of Cosine

What is the angle on the unit circle where cosine equals 1/2?

• π/2

• π/6

• π/3

• π/4

Why is the range of inverse cosine restricted between 0 and π?

• To simplify calculations

• To ensure unique values

• To match the range of sine

• To avoid negative angles

Which point on the unit circle corresponds to an inverse cosine of -1/2?

• π/6

• 2π/3

• 5π/6

• π/3

What is the next step after identifying the point on the unit circle for inverse cosine?

• Calculate the sine value

• Determine the angle restrictions

• Find the tangent value

• Convert to radians

Which trigonometric functions have different restrictions for their inverse?

• Cosine and tangent only

• Sine, cosine, and tangent

• Sine and cosine only

• Tangent only