यदि किसी त्रिभुज ABC के शीर्ष A, B, C क्रमशः `(1, 2, 3), (-1, 0, 0), (0, 1, 2)` है तो `angle ABC ` ज्ञात कीजिए | [ ` angle ABC`, सदिशों `vec(BA)` एवं `vec(BC)` के बीच का कोण है ]

If the vertices A,B, C of a triangle ABC are (1,2,3),(-1, 0,0), (0, 1,2), respectively, then find angle ABC .

If the vertices A, B, C of a triangle ABC are (1,2,3), (-1,0,0), (0,1,2) respectively, then find angleABC [ angleABC is the angle between the vectors vec(BA) and vec(BC) ]

If either vector A,B,C of a triangle ABC are (1,2,3),(-1,0,0),(0,1,2), respectively , then find angleABC.[angleABC is the angle between the vectors vec(BA)andvec(BC) ].

If either vector A,B,C of a triangle ABC are (1,2,3),(-1,0,0),(0,1,2), respectively , then find angleABC.[angleABC is the angle between the vectors vec(BA)andvec(BC) ].

If either vector A,B,C of a triangle ABC are (1,2,3),(-1,0,0),(0,1,2), respectively , then find angleABC.[angleABC is the angle between the vectors vec(BA)andvec(BC) ].

If either vector A,B,C of a triangle ABC are (1,2,3),(-1,0,0),(0,1,2), respectively , then find angleABC.[angleABC is the angle between the vectors vec(BA)andvec(BC) ].

If either vector A,B,C of a triangle ABC are (1,2,3),(-1,0,0),(0,1,2), respectively , then find angleABC.[angleABC is the angle between the vectors vec(BA)andvec(BC) ].

A(2, 3, 1), B(-2, 2, 0) and C(0, 1, -1) are the vertices of the triangle ABC. Show that the triangle ABC is right -angled.

The sides AB and AC of a triangle ABC are extended to P and Q respectively. If the bisectors of angle PBC and angle QCB intersect at O, and angle A=92^@ , then angle BOC is equal to: एक त्रिभुज ABC की भुजाओं AB और AC को क्रमशः P तथा Q तक बढ़ाया जाता है | यदि angle PBC तथा angle QCB के समद्विभाजक एक दूसरे को O पर काटते हैं तथा angle A=92^@ है, तो angle BOC किसके बराबर है ?