KEAM 2015 Math Paper

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Question : 88 of 120

Marks: +1, -0

The angle between two vectors

⋀

i

+

⋀

j

+

⋀

k

and 2

⋀

i

−2

⋀

j

+2

⋀

k

is equal to

cos−1(
2
3
)
cos−1(
1
6
)
cos−1(
5
6
)
cos−1(
1
18
)
cos−1(
1
3
)

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