Question

vector A has magnitude 6 units and vector B has magnitude of 5 units the cross product of vector A and vector B hs magnitude of 15 .find angle between between A and B

Answer 1

let angle between A and B = x
A×B = A B sinx
15 = 5× 6 sinx
sinx = 15/30
sin x = 1/2
therefore x = 30°