How to determine the function and angle when given an expression

The video tutorial focuses on memorizing and understanding trigonometric formulas, specifically sine and cosine. The instructor shares personal experiences with memorization and emphasizes the importance of recognizing differences between sine and cosine formulas. The tutorial also covers the application of these formulas in solving problems, using examples to illustrate the concepts.

What is the key to memorizing formulas according to the speaker?

• Practicing with problems

• Using flashcards

• Listening to lectures

• Reading the book multiple times

How does the speaker suggest identifying the sine formula?

• By looking for alternating sine and cosine terms

• By checking if the terms are all cosine

• By ensuring all terms are sine

• By finding the product of angles

What is a characteristic of the cosine formula mentioned by the speaker?

• It has the same signs for all terms

• It alternates between sine and cosine

• It has opposite signs for the terms

• It only uses sine terms

What does the speaker say about the tangent formula?

• It is the same as the sine formula

• It includes both sum and difference

• It is not used in angle calculations

• It only involves addition

How does the speaker calculate the sine of a sum of angles?

• By dividing the angles

• By multiplying the angles

• By subtracting the angles

• By adding the angles