Evaluate the inverse trig with composition

The video tutorial focuses on understanding the unit circle and the concept of cosine. It explains how to interpret cosine as adjacent over hypotenuse and explores the use of cosine inverse to find angles not on the unit circle. The tutorial further demonstrates how to calculate the tangent of an angle using a triangle, emphasizing the importance of understanding trigonometric functions beyond the unit circle.

What is the relationship between cosine and the unit circle as discussed in the text?

Why is it important to understand cosine differently when dealing with angles not on the unit circle?

How can we interpret the cosine inverse of 3/4 in terms of a triangle?

What steps are involved in finding the tangent of the triangle formed from the cosine inverse of 3/4?

What is the approximate value of 'a' when calculating the tangent in the context provided?