Evaluating the composition of cosine and sine inverse

The video tutorial covers the assessment of homework through quizzes, focusing on trigonometric concepts such as sine inverse and cosine. It explains the conversion between radians and degrees, simplifying trigonometric expressions, and evaluating cosine values. The teacher engages with students, emphasizing the importance of understanding the unit circle and coordinates. The session concludes with a recap of the key points discussed.

What angle in radians corresponds to the sine inverse of 1/2?

• π/3

• π/6

• π/2

• π/4

How can the fraction 2/6 be simplified?

• 1/4

• 2/3

• 1/3

• 1/2

What is the cosine of π/3?

• 1/2

• √3/2

• 1

• 0

In the unit circle, what does the cosine function represent?

• Radius

• Angle

• Y-coordinate

• X-coordinate

Which angle corresponds to π/3 on the unit circle?

• π/2

• π/3

• π/6

• π/4