TS EAMCET 14-Sep-2020 Shift 1 Solved Paper

Section: Mathematics

Question : 48 of 160

Marks: +1, -0

The acute angle between the pair of straight lines joining the origin to the points of intersection of the line x+y−1=0 with the pair of straight lines
kx2+8xy−3y2+2x−4y−1=0 is

π
2
π
4
Cos−1(
1
√10
)
Cos−1(
3
√2
)

Validate

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k	4	1
4	−3	−2
1	−2	−1