Let `vec(a)` and `vec(b)` be two non-collinear unit vectors . If `vec(u)=vec(a)-(vec(a)*vec(b))vec(b)` and `vec(v)=vec(a)xxvec(b)` , then `|vec(v)|` is

Options

A. `|vec(u)|`
B. `|vec(u)|+|vec(u)*vec(a)|`
C. `|vec(u)|+|vec(u)*vec(b)|`
D. `|vec(u)|+vec(u)*(vec(a)+vec(b))`

Answer

A, C