If `veca and vecb` asre two vectors such that `|veca|=2, |vecb|`= 7 and `vecaxxvecb=3hati+6hatk` find the angle between `veca and vecb`

If |veca|=2,|vecb|=7 and (vecaxxvecb)=3hati+2hatj+6hatk find the angle between veca and vecb

If veca and vecb are two such that |veca|=5, |vecb|=4 and |veca.vecb|=10 , find the angle between veca and vecb and hence find |vecaxxvecb|

IF |veca|=sqrt(3), |vecb|=2 and |veca-vecb|=3 find the angle between veca and vecb .

If veca,vecb are two unit vectors such that |veca + vecb| = 2sqrt3 and |veca -vecb|=6 then the angle between veca and vecb , is

If veca and vecb are two vectors, such that veca.vecblt0 and |veca.vecb|=|vecaxxvecb| then the angle between the vectors veca and vecb is (a) pi (b) (7pi)/4 (c) pi/4 (d) (3pi)/4

If veca and vecb be two non-collinear unit vectors such that vecaxx(vecaxxvecb)=-1/2vecb ,then find the angle between veca and vecb .

If veca and vecb are two unit vectors such that veca+2vecb and 5veca-4vecb are perpendicular to each other, then the angle between veca and vecb is

If |veca|=sqrt(26), |vecb|=7 and |vecaxxvecb|=35, find veca.vecb

veca and vecb are two vectors such that |veca|=1 ,|vecb|=4 and veca. Vecb =2 . If vecc = (2vecaxx vecb) - 3vecb then find angle between vecb and vecc .

Let the vectors veca and vecb be such that |veca|=3and|vecb|=sqrt2/3"then|" vecaxxvecb is a unit vector. If the angle between veca and vecb is ?