Learn how to eliminate the parameter with trig functions

The video tutorial explains how to solve an equation by expressing it in terms of X and Y. It uses trigonometric identities, specifically the Pythagorean identity, to transform the equation. The process involves substituting sine and cosine values and simplifying the equation to derive the equation of a circle with a radius of 2.

Discuss the differences between the cosine and sine representations as mentioned in the text.

What is the significance of the equation X^2 + Y^2 = 4 in geometry?