Question

If A = 2 and B = 4 and angle between them is 60°
then AB​

Answer 1

Answer:

4

Explanation:

A·B = AB cosФ = 2×4×Cos60° = 2×4×(1/2)=4

Answer 2

Answer:

|a-b|=√(a²+b²-2×a×b×cos60°)