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The equation Kx^(2)+4xy+5y^(2)=0 represe...

The equation `Kx^(2)+4xy+5y^(2)=0` represents two lines inclined at an angle `pi` if K =

A

`(5)/(4)`

B

`(4)/(5)`

C

`(-4)/(5)`

D

2

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-PAIR OF STRAIGHT LINES-PRACTICE EXERCISE
  1. The equation 3x^(2)+10xy-8y^(2) =0 represents

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  2. If ax^(2)+12xy+9y^(2)=0 epresents two coincident lines then a=

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  3. The equation Kx^(2)+4xy+5y^(2)=0 represents two lines inclined at an a...

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  4. The equation 11x^(2)-2xy+4y^(2)=0 represents

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  5. The sum and product of the slopes of the lines 2x^(2)-xy-y^(2)=0 are

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  6. The two lines 4x^(2)-24xy+11y^(2)=0 makes with x-axis angles such tha...

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  7. The difference of the slopes of the lines 3x^(2)-8xy-3y^(2)=0 is

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  8. The combined equation to a pair of straight lines passing through the ...

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  9. If the slope of one line of the pair 8x^(2)+2hxy+y^(2)=0 is twice the ...

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  10. If the slope of one line of the pair of ax^(2)+2hxy+by^(2)=0 is double...

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  11. The equation of the pair of lines passing through (1,-1) and parallel ...

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  12. The equation to the pair of st lines passing through (1, 2) and perpen...

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  13. The equation to the pair of lines passing through the origin and perpe...

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  14. The product of the perpendiculars from (-1, 2) to the pair of lines 2x...

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  15. Angle between the lines x^(2)+2xysecalpha+y^(2)=0 is

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  16. If the pair of lines given by (x^(2)+y^(2))cos^(2) theta=(x cos theta+...

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  17. If the acute angle between the pair of lines x^(2)+4sqrt2xy+lamday^(...

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  18. If the pair of lines given by lamda(lamda-3)x^(2)+16xy+(lamda+1)y^(2)=...

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  19. The angle between the straight lines represented by (x^(2)+y^(2))sin^(...

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  20. The equation of the bisector of the acute angle between the lines 4x-3...

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