दो सदिशों `bara` और `barb` के परिमाण क्रमशः `sqrt(3)` और 4 तथा `bara.barb, 2sqrt(3)` है | इनके बीच का कोण है :

If bara = (-4, 2,4) and barb = (sqrt2, - sqrt2, 0), " then " (2bara,(barb)/2) =

If absbara =2, absbarb =3, (bara,barb) = 120^(@), " then " bara.barb =

If, absbara = 3, absbarb = 4 abs(bara+barb) = 1 " ,then " abs(bara-barb) =

If absbara =3, absbarb = 4, and (bara-barb) = 5, " then " abs(bara+barb)=

(3bara xx 2barb)·barc + (3barb xx 2barc)·bara + (4barc xx 3barb)·bara =

If absbara =3, absbarb = 4 and (bara,barb) = pi/2," then " abs(bara+barb)=

If bara+barb+barc=bar0 and absbara=3, absbarb = 4, absbarc =sqrt37, " then " (bara,barb) =

If (bara+barb)botbara, absbarb =sqrt2 absbara , then

Show that the vectors bara - 2barb + 3barc,- 2bara + 3barb - 4barc and bara - 3barb + 5barc are coplanar, where a, b, c are non- coplanar vectors.