Question

A=4i +4j -4k & B=3i +j +4k , then angle between vector A and B is

Answer 1

Answer:

Answer is 90

Explanation:

Because Dot product is zero

Answer 2

Answer:90°

Explanation:A><B= 4><3+4><1+(-4)><4=0

Then, cosA=0

=>CosA=cos90°

=>A=90°