JEE Main 15 Apr 2018 Shift 1 Solved Paper

Section: Mathematics

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Question : 85 of 90

Marks: +1, -0

If

→

a

,

→

b

and

→

c

are unit vectors such that

→

a

+2

→

b

+2

→

c

=

→

0

,then |

→

a

×

→

c

| is equal to:

[Main 15 April 2018 S1]

√15
4
1
4
15
16
√15
16

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