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Vector Algebra question

2012 · Shift 0 · Q28

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PYQ Library
JEE Main
Mathematics
Vector Algebra
2012 · Shift 0 · Q28

Vector Algebra question

2012 · Shift 0 · Q28

JEE MainMathematicsVector AlgebraMCQ+4 / −1

Let

\overrightarrow a

and

\overrightarrow b

be two unit vectors. If the vectors

\,\overrightarrow c = \widehat a + 2\widehat b

and

\overrightarrow d = 5\widehat a - 4\widehat b

are perpendicular to each other, then the angle between

\overrightarrow a

and

\overrightarrow b

is :

A
${\pi \over 6}$
B
${\pi \over 2}$
C
${\pi \over 3}$
D
${\pi \over 4}$

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