MathematicsMedium202×since 2002Q5761The values of a, for which the points A,B,CA, B, CA,B,C with position vectors 2i^−j^+k^, i^−3j^−5k^2\widehat i - \widehat j + \widehat k,\,\,\widehat i - 3\widehat j - 5\widehat k2i−j+k,i−3j−5k and ai^−3j^+k^a\widehat i - 3\widehat j + \widehat kai−3j+k respectively are the vertices of a right angled triangle with C=π2C = {\pi \over 2}C=2π are :A222 and 111B−2-2−2 and −1-1−1C−2-2−2 and 111D222 and −1-1−1Check answerSkip