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Vector Algebra question

2006 · Shift 0 · Q65

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PYQ Library
JEE Main
Mathematics
Vector Algebra
2006 · Shift 0 · Q65

Vector Algebra question

2006 · Shift 0 · Q65

JEE MainMathematicsVector AlgebraMCQ+4 / −1

The values of a, for which the points

A, B, C

with position vectors

2\widehat i - \widehat j + \widehat k,\,\,\widehat i - 3\widehat j - 5\widehat k

and

a\widehat i - 3\widehat j + \widehat k

respectively are the vertices of a right angled triangle with

C = {\pi \over 2}

are :

A
$2$ and $1$
B
$-2$ and $-1$
C
$-2$ and $1$
D
$2$ and $-1$

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