The formula for the sine of a sum of two angles $A$ and $B$ is given by:

$\sin(A + B) = \sin(A) \cos(B) + \cos(A) \sin(B)$

This identity is very useful in trigonometry for simplifying expressions or solving problems involving the sum of angles.

Would you like a specific example or further details on how to use this identity? Let me know!

Related Questions:

1. How do you derive the sine sum formula?
2. What is the cosine of the sum of two angles formula?
3. How do you apply trigonometric identities in solving equations?
4. What is the sine subtraction identity?
5. How can you use the sine sum formula in integration?

Tip: When memorizing trigonometric identities, it’s helpful to relate them to the unit circle and the geometric meanings of the sine and cosine functions.