If `vec a xx (vec bxxvec c)+(vec a*vec b)vec b=(4-2beta-sinalpha)vec b+(beta^2-1)vecc` and `(vec c *vec c)vec a=vec c,vec b,vec c` being non-collinear then

vec a xx (vec b xxvec c) + (vec a * vec b) vec b = (4-2 beta-sin alpha) vec b + (beta ^ (2) -1) vec c and (vec c * vec c) vec a = vec c, vec b being non-collinear then

vec b,vec c being non-collinear if vec a xx (vec bxxvec c)+(vec a*vec b)vec b=(4-2x-siny)vec b+(x^2-1)vecc and (vec c *vec c)vec a=vec c , then

vec b,vec c being non-collinear if vec a xx (vec bxxvec c)+(vec a*vec b)vec b=(4-2x-siny)vec b+(x^2-1)vecc and (vec c *vec c)vec a=vec c , then

[vec a+vec b,vec b+vec c,vec c+vec a]=2[vec a,vec b,vec c]

[vec a + vec b, vec b + vec c, vec c + vec a] = 2 [vec a, vec b, vec c]

[[vec a + vec b-vec c, vec b + vec c-vec a, vec c + vec a-vec b is equal to

36. If vec a, vec b,vec c and vec d are unit vectors such that (vec a xx vec b) . vec c xx vec d= 1 and vec a.vec c =1/2 then a) vec a, vec b and vec c are non-coplanar b) vec b, vec c ,vec d are non -coplanar c) vec b, vecd are non parallel d) vec a , vec d are parallel and vec b, vec c are parallel

36. If vec a, vec b, vec c and vec d are unit vectors such that (vec a xx vec b) .vec c xx vec d = 1 and vec a.vec c = 1/2 then a) vec a, vec b and vec c are non-coplanar b) vec b, vec c, vec d are non -coplanar c) vec b, vecd are non parallel d) vec a, vec d are parallel and vec b, vec c are parallel

If vec a, vec b,vec c and vec d are unit vectors such that (vec a xx vec b) . vec c xx vec d= 1 and vec a.vec c =1/2 then a) vec a, vec b and vec c are non-coplanar b) vec b, vec c ,vec d are non -coplanar c) vec b, vecd are non parallel d) vec a , vec d are parallel and vec b, vec c are parallel

vec a * {(vec b + vec c) xx (vec a + 2vec b + 3vec c)} = [vec with bvec c]