The video tutorial explains how to identify and apply the sine difference formula in trigonometry. It begins by discussing the appearance of trigonometric functions and formulas, then focuses on recognizing the sine difference formula. Finally, it demonstrates how to apply this formula to simplify expressions, specifically transforming 3X minus X into 2X.

Which trigonometric function is being compared to the given expression in the introduction?

• Tangent

• Sine

• Cosine

• Secant

What does the expression 'sine of U, cosine of V, cosine of U, sine of V' represent?

• Sum formula for cosine

• Sum formula for sine

• Difference formula for sine

• Difference formula for cosine

In the context of trigonometric formulas, what does the term 'difference' refer to?

• Multiplication of angles

• Division of angles

• Subtraction of angles

• Addition of angles

How would you simplify the expression '3X - X' using the difference formula?

• X

• 2X

• 4X

• 0

What is the final simplified form of the expression using a single trigonometric function?

• 2X

• X

• 4X

• 3X