Evaluating the composition of sine and cosine functions

The video tutorial explains the concept of sine inverse, focusing on how to evaluate the sine inverse of 1/2. It uses trigonometric equations and unit circle concepts to find angles, specifically highlighting the 30-60-90 triangle. The tutorial also covers domain restrictions for inverse functions and demonstrates how to calculate the cosine of π/6 using the unit circle.

How do you determine the cosine of π / 6 using the unit circle?

Describe the relationship between the sine and cosine values for the angle of 30 degrees.