Let O be the origin, and vector OX,OY,OZ be three unit vectors in the directions of the sides vectors QR,RP, PQ respectively, of a triangle PQR. Vector `|vec(OX)=vec(OY)|=` (A) `sin2R` (B) `sin(P+R)` (C) `sin(P+Q)` (D) `sin(Q+R)`

Let O be the origin and vec(OX) , vec(OY) , vec(OZ) be three unit vector in the directions of the sides vec(QR) , vec(RP),vec(PQ) respectively , of a triangle PQR. |vec(OX)xxvec(OY)|=

Let O be the origin, and O X , O Y , O Z be three unit vectors in the direction of the sides Q R , R P , P Q , respectively of a triangle PQR. | O X xx O Y |= (a)sin(P+R) (b) sin2R (c)sin(Q+R) (d) sin(P+Q)dot

Let O be the origin, and O X x O Y , O Z be three unit vectors in the direction of the sides Q R , R P , P Q , respectively of a triangle PQR. If the triangle PQR varies, then the minimum value of cos(P+Q)+cos(Q+R)+cos(R+P) is: -3/2 (b) 5/3 (c) 3/2 (d) -5/3

Find a unit vector in the direction of vec(PQ) , where P and Q have coordinates (5, 0, 8) and (3, 3, 2) respectively.

Find the unit vector in the direction of vector vec P Q , where P and Q are the points (1,2,3) and (4,5,6), respectively.

Find the unit vector in the direction of vector vec P Q , where P and Q are the points (1,2,3) and (4,5,6), respectively.

Find the unit vector in the direction of vector vec(PQ) , where P and Q are the points (1, 2, 3) and (4, 5, 6), respectively.

Find the unit vector in the direction of vector vec (PQ) , where P and Q are the points (1,2,3) and (4,5,6) , respectively.

If vec r is a vector of magnitude 21 and has direction ratios 2,-3a n d6, then find vec rdot

Write a unit vector in the direction of vec P Q ,\ w h e r e\ P\ a n d\ Q are the points (1, 3, 0) and (4, 5, 6) respectively.