Vectors

Question 1

What is the magnitude of a vector <x, y>?

Answer 1

√(x^2 + y^2)

Question 2

How would you add <a, b> and <c, d>?

Answer 2

<a + c, b + d>

Question 3

How would you multiply vectors a and b?

Answer 3

ax * bx + ay * by

Question 4

Given an sas, how would you find the dot product?

Answer 4

|a||b|cos(x)

Question 5

How do you find the angle between two vectors?

Answer 5

a*b / |a||b| = cos(x)