Question

A vec + B vec + C vec = 0.
And A,B& C vectors are unit vectors.
Find :
A.B + B.C + A.C

Answer 1

here we go
VECTORS

Answer 2

A = 1
B = 1
C = 1

Answer 3

\[1 \cos \alpha + 1 \cos \beta + 1 \cos \gamma\]