Question

If Ā.B =Č.B which of the following can not be a possible case :

A=C

angle between A and B = 30° and angle between B and Ĉ = 150° all three
vectors are of equal magnitude.

B is a mull vector

A. B and c are along x, y and z-axis respectively​

Answer 1

Answer:

(a.c) a = b ( a.a = | a |2 = 1 ) | c - (a.c) a |2 = | b |2 | c |2 + | a.c |2 | a |2 - 2 (a.c) ...

Top answer

We have a × ( a × c ) + b = 0 (a.c) a - (a.a) c = - b c - (a.c) a = b ( a.a = | a |2 = 1 ) | c - (a.c) a |2 = | b |2 | c |2 + | a.c |2 | a |2 - 2 (a.c)

Answer 2

Answer:(a.c) a = b ( a.a = | a |2 = 1 ) | c - (a.c) a |2 = | b |2 | c |2 + | a.c |2 | a |2 - 2 (a.c) ...

We have a × ( a × c ) + b = 0 (a.c) a - (a.a) c = - b c - (a.c) a = b ( a.a = | a |2 = 1 ) | c - (a.c) a |2 = | b |2 | c |2 + | a.c |2 | a |2 - 2 (a.c)