Why the unit circle is so helpful for us to evaluate trig functions

The video tutorial covers the significance of the unit circle in trigonometry, focusing on special triangles like 30-60-90 and 45-45-90. It explains how to convert angles to radians and highlights the importance of memorizing key points on the unit circle. The tutorial also demonstrates how the unit circle simplifies finding sine values for angles like 90 and 180 degrees, which cannot be evaluated using triangles alone.

Why is it important to understand the unit circle and its points in trigonometry?

Explain how the unit circle helps in finding the sine of 90 degrees.

What is the Y coordinate of the point on the unit circle at 180 degrees?