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 order of operations, the unit circle, and the conversion of angles from degrees to radians. The teacher simplifies fractions and evaluates trigonometric expressions, engaging students in understanding the X and Y coordinates on the unit circle.

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

• π/2

• π/3

• π/6

• π/4

How can the fraction 2/6 be simplified?

• 1/2

• 1/3

• 2/3

• 1/4

What is the cosine of π/3?

• √3/2

• 1

• 1/2

• 0

In the unit circle, what does the cosine of an angle represent?

• Angle in degrees

• Y-coordinate

• Radius

• X-coordinate

Which angle corresponds to an x-coordinate of 1/2 on the unit circle?

• π/4

• π/3

• π/6

• π/2