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the values of a for which the points A,B,C with the position vectors 2i-j+k, i-3j-5k and ai-3j+k respectively are the vertices of a right angled triangle with C=90 are
Dear Ajay Use CA. CB = 0 (as angle C is right angle) you will get a = 1, 2hope it helps RegardsArun (askIITians forum expert)
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