Verify Cofunction Identity using Difference Formula

The video tutorial covers cofunction identities, focusing on the relationship between sine and cosine. It discusses common mistakes made in quizzes, particularly with secant and cosecant. The instructor introduces sum and difference formulas to verify identities and demonstrates their application. The session concludes with a preference for understanding transformations through graphs rather than memorization.

What mistake do students often make when applying the U and V variables in the formulas?

Discuss the teacher's preferred method of understanding trigonometric identities.