- #1

ydan87

- 25

- 0

**radius r**and an axis that passes through

**point b**with the

direction of

**vector n**, show that its equation can be written in any of the following forms:

1) ||(p-b) X n|| = r

2) (p - b) X n = r.e (where e s ia

**unit vector**orthogonal to n)

3) ||(p-b) - ((p-b).n)n|| = r

. = vector-vector dot product

X = vector-vector cross product

Thanks in advance for any guide given...