What is the anlge between `vec P xx vec Q and vec Q xx vec P` is

What is the angle between (vec(P)+vec(Q)) and (vec(P)xxvecQ)?

What can be the angle between (vec(P) + vec(Q)) and (vec(P) - vec(Q)) ?

What can be the angle between (vec(P) + vec(Q)) and (vec(P) - vec(Q)) ?

What is the angle between vec P and the resultant of (vec P+vec Q) and (vec P-vec Q)

If vec(P).vec(Q) = 0 , then what is the angle between vec(P) and vec(Q) ?

If vec(P).vec(Q)=1 , then what is the angle between vec(P) and vec(Q) ?

Three vectors vec P,vec Q,vec R are such that the |vec P|=|vec Q|,|vec R|=sqrt(2)|vec P| and vec P+vec Q+vec R=0 the ange between vec P and vec Q,vec Q and vec R=0 the ange between vec P and respectively

if vec(P) xx vec(R ) = vec(Q) xx vec(R ) , then

What is the angle between vec(P) and the resultant of (vec(P)+vec(Q)) and (vec(P)-vec(Q)) ?