Write the sum and difference formula as a single trigonometric function

The video tutorial guides students through identifying and solving trigonometric equations, focusing on distinguishing between sine, cosine, and tangent. The teacher emphasizes the cosine formula for addition and subtraction of angles, using an example to demonstrate how to solve for angles X and π/7. The lesson concludes with a single trigonometric equation, highlighting the importance of recognizing and applying the correct formula.

What is the main task that the teacher is trying to accomplish with the equations?

Which trigonometric function is being discussed in relation to the equations?

What is the relationship between the cosine of addition and subtraction of angles as discussed?

What are the two angles mentioned in the context of the cosine function?

What is the final expression derived from the cosine function in the discussion?