Question

Which of the following is the same as cos ( A + B)?

1. sin A cos B + cos A sin B
2. cos A cos B + sin A sin B
3. sin A cos B - cos A sin B
4. cos A cos B - sin A sin B

Answer 1

Answer:

4 . cosA cosB -sin A sin B

Step-by-step explanation:

4 Is the correct answer

Answer 2

Step-by-step explanation:

Hello mate ❤️

answer is (4)

Cos(A+B) = cos A cosB - sin A sin B

hope it is helpful ✌️