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`
Let O be the origin and OX, OY, OZ be three unit vectors in the directions of the sides, QP, RP, QR respectively of a trianglePQR . Q. If the triangle PQR varies, then the minimum value of cos(P+Q)+cos(Q+R)+cos(R+P) is
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 |= s in(P+R) (b) sin2R (c)sin(Q+R) (d) sin(P+Q)dot
If in a triangle PQR;sin P,sin Q,sin R are in A.P; then
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In a three dimensional co-odinate , P, Q and R are images of a point A(a, b, c) in the xy, yz and zx planes, respectively. If G is the centroid of triangle PQR, then area of triangle AOG is (O is origin)
