Prove the co function identities by sum and difference formulas

The video tutorial explains the process of subtracting two angles using a specific formula. It emphasizes the importance of labeling angles as U and V to avoid confusion. The tutorial then applies the cosine formula to the subtraction of angles and clarifies the concept of U - V. Finally, it simplifies the expression using trigonometric identities, demonstrating the result of the identity.

What is the first step to avoid confusion when working with angle subtraction?

• Label the angles as U and V

• Use different colors for each angle

• Draw a diagram of the angles

• Memorize the formula

In the trigonometric identity for angle subtraction, what operation is performed after identifying U and V?

• Divide U by V

• Subtract V from U

• Add U and V

• Multiply U and V

What is the result of cosine of π/2 in the context of this identity?

• Undefined

• -1

• 0

• 1

What is the sine of π/2 according to the identity discussed?

• Undefined

• -1

• 1

• 0

What is the final simplified result of the trigonometric identity discussed in the video?

• cosine of X

• tangent of X

• sine of X

• cotangent of X