The video tutorial explains how to simplify a rational expression involving trigonometric functions. The instructor discusses different methods, including using the conjugate and Pythagorean identity, but opts for a more straightforward approach by factoring the expression. By recognizing the trinomial form, the expression is factored and simplified, resulting in a concise solution.

What is the main challenge mentioned in simplifying the given trigonometric expression?

• Multiplying by the conjugate

• Finding the derivative

• Integrating the expression

• Solving for X

What algebraic form does the speaker identify in the expression?

• A quadratic equation

• A polynomial of degree three

• A linear equation

• A trinomial

How does the speaker suggest factoring the expression?

• By using synthetic division

• By completing the square

• Using the quadratic formula

• By recognizing it as a perfect square trinomial

What is the final simplified form of the expression?

• sine squared of X

• sine of X - 1

• sine of X + 1

• sine of X

What is the key step in the simplification process?

• Adding similar terms

• Dividing out similar terms

• Subtracting similar terms

• Multiplying similar terms