Subtracting two rational trig expression to simplify

The video tutorial reviews rational expressions and the concept of common denominators, then extends these ideas to trigonometric expressions. It demonstrates how to find the least common denominator (LCD) for trigonometric expressions and applies the distributive property to simplify them. The tutorial concludes by using the Pythagorean identity to further simplify the expression to secant.

What is the least common denominator (LCD) when adding rational expressions involving X and Y?

Explain the process of obtaining a common denominator for the expressions involving cosine and sine.

Describe the significance of the distributive property in simplifying trigonometric expressions.

What is the result of applying the Pythagorean identity to sine squared and cosine squared?

How do you simplify the expression one over cosine of X?