13. If a, b, c are unit vectors such that a + b + c = 0, find the value of a.b + b.c + c.a. 13. If a B c are unit vectors such that a + b + c = 0 find the value of a.b + b.c + c.a. November 5, 2021 Category: Chapter 10 - Vector Algebra , Maths , NCERT Exemplar Class 12 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related