TS EAMCET 14-Sep-2020 Shift 2 Solved Paper

Section: Mathematics

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Question : 32 of 160

Marks: +1, -0

If

−

a

,

−

b

,

−

c

are three mutually perpendicular vectors such that the magnitudes of

−

b

and

−

c

are

1

2

times and

√3

2

times that of

−

a

, respectively, then the angle between the vectors

−

a

+

−

b

+

−

c

and

−

b

is

45°
Cos−1(
1
2√2
)
Cos−1(
√6
4
)
Cos−1(
1
4
)

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