Question

find the unit vector perpendicular to both and b vector a=i-7j+7k
b=3i-2j+2k​

Answer 1

Step-by-step explanation:

Addition of vactors

A+b=(1+3)i + (-7)+(-2)j + (7+2)k

3i -9j+9k

Magnitude of vactor

√171

Unit vactor

√3i-9j+9k/√171