If `P(0,1,2),Q(4,-2,1)` and `O(0,0,0)` are three points, then `/_POQ=`

If P(0,1,2),\ Q(4,-2,1)a n d\ O(0,0,0) are three points then angle P O Q= a. pi/6 b. pi/4 c. pi/3 d. pi/2

If P(0, 1, 2), Q(4, -2, 1) and R(0, 0, 0) are three points, then anglePRQ is

If P(0, 1, 2), Q(4, -2, 1) and R(0, 0, 0) are three points, then anglePRQ is

If P(0, 1, 2), Q(4, -2, 1) and O(0, 0, 0) are distinct points the manglePOQ = ______.

If P=(1,0), Q=(-1,0) and R=(2,0) are three given points, then the locus of S satisfying the relation S Q^(2)+S R^(2)=2 S P^(2) is

If P(1,0),Q(-1,0) and R(2,0) are three given points,then the locus of the point S satisfying the relation (SQ)^(2)+(SR)^(2)=2(SP)^(2)

If P(1,0) ,Q(-1,0) and R(2,0) are three given points ,then the locus of point S satisfying the relation (SQ)^(2)+(SR)^(2)=2(SP)^(2) is

If P(0,0), Q(1,0) and R (1/2,sqrt3/2) are three given points, then the centre of the circle foe which the lines PQ, QR and RP are the tangents is

If P= (1,0);Q=(-1.0) & R= (2,0) are three given points, then the locus of the points S satisfying the relation, SQ^2 + SR^2 =2SP^2 is -