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.

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