The value of 'a' for which the points A...

The value of 'a' for which the points A, B,C with position vectors ` 2hati - hatj + hatk , hati + 2hatk, hati -3hatj - 5hatk and a hati -3hatj +hatk` respectively are the vertices of a right angled triangle with ` C = pi//2`, are

2 and 1

-2 and - 1

`-2` and 1

2 and -1

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DISHA PUBLICATION-VECTOR ALGEBRA-EXERCISE -1 : CONCEPT BUILDER

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