Write an expression as a single trigonometric function using sum and difference formula

The video tutorial explains how to identify and use trigonometric sum and difference formulas, focusing on cosine. It guides through identifying variables U and V, solving the equation, and simplifying the expression to cosine of 8X/7.

Which trigonometric formula is identified as relevant in the discussion?

• None of the above

• Sum and difference of cosine

• Sum and difference of sine

• Sum and difference of tangent

In the context of the cosine formula, what are U and V?

• Variables representing angles

• Constants in the equation

• Coefficients of the equation

• None of the above

What is the first step in simplifying the expression X + 7 + X?

• Find a common denominator

• Multiply by 7

• Add X and 7

• Subtract 7 from X

What is the final expression for the trigonometric function discussed?

• Sine of eight X / 7

• Cosine of eight X / 7

• Tangent of eight X / 7

• None of the above

What mathematical operation is used to combine X + 7 and X?

• Multiplication

• Division

• Subtraction

• Addition