JEE Mains Model Paper 2

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Question : 85 of 90

Marks: +1, -0

Consider the parallelepiped with sides

−

a

= 3

−

i

+2

−

j

+

−

k

,

−

b

=

−

i

+

−

j

+2

−

k

and

−

c

=

−

i

+3

−

j

+3

−

k

then the angle between

−

a

and the plane containing the face determined by

−

b

and

−

c

is

sin−1 (1/3)
cos−1 (9/14)
sin−1 (9/14)
sin−1 (2/3)

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