The magnitude of the resultant of vectors `vecP` and `vecQ` is given by `R^(2)=P^(2)+Q^(2)`.What is the angle between `vecP` and `vecQ`.

Find the magnitude of two vectors veca and vecb , having the same magnitude and such that the angle between them is 60^o and their scalar product is 1/2 .

Magnitude of the vector vec(PQ) , joining the points P(2,3,0) and Q(1,-2,-4) is :

Answer carefully: Two large conducting spheres carrying charges Q_1 and Q_2 are brought close to each other. Is the magnitude of electrostatic force between them exactly given by ((Q_1 Q_2 )//(4piepsilon_0r^2)) , where r is the distance between their centres?

Find the angle between the vectors (1,-1,1) and (2,3,6).

If the angle between two vectors veca" and "vecb with magnitude 1 and 2 respectively and when |veca xx vecb|= sqrt(3) is