KEAM 2015 Math Paper

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Question : 97 of 120

Marks: +1, -0

The angle between the straight line

→

r

=(

⋀

i

+2

⋀

j

+

⋀

k

)+s(

⋀

i

−

⋀

j

+

⋀

k

)

and the plane

→

r

.(2

⋀

i

−

⋀

j

+

⋀

k

)=4 is

sin−1(
2√2
3
)
sin−1(
√2
6
)
sin−1(
√2
3
)
sin−1(
2
√3
)
sin−1(
2
3
)

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