Question

If the magnitude of two vectors are 3 and 4 and their scalar product is 6 root3. The angle between the vectors will be
Choose answer:

30°


60°


45°


37°

Answer 1

Answer:

A.B = 6 √3

A.B = AB cosѲ

6 √3 = 3 × 4 cosѲ

cosѲ = 6√3 /12

cosѲ=√3 /2

Therefore

Ѳ = 30°