Learn How the Find the Sine Inverse

The video tutorial explains how to interpret cosine inverse as a request for an angle. It guides through identifying angles where cosine equals specific values, using the unit circle and quadrants. The tutorial demonstrates calculating the angle π and verifies it against cosine restrictions, ensuring it lies between the first and second quadrants.

What does the cosine inverse function help us determine?

• The area of a circle

• The angle corresponding to a given cosine value

• The tangent of an angle

• The length of a side in a triangle

In the unit circle, where is the x-coordinate equal to 1?

• At the point (0, -1)

• At the point (-1, 0)

• At the point (1, 0)

• At the point (0, 1)

What angle corresponds to the cosine value of 1 in the unit circle?

• 0

• π

• π/2

• 3π/2

Which quadrants must the angle lie between to satisfy the cosine restriction?

• Third and Fourth

• First and Second

• Second and Fourth

• First and Third

What is the final angle determined for the cosine value of 1?

• π/2

• 0

• π

• 2π