Question

a = i +2j -3k and b = -2i -j +5k are two vectors, how to find the angle between the vectors and how to find a vector that is perpendicular to vector a

Answer 1

Try using inner product: Angle = arccos[(a dot b)/(|a||b|)]

Answer 2

Dot <12,-3>.<-2,-1,5>

Answer 3

how do I get the vector perpendicular - second part of the question

Answer 4

Cross the 2 vectors, result is vector perpendicular