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If the angle alpha is acut, then the acu...

If the angle `alpha` is acut, then the acute angle between the pair of staight lines `x^2(costheta-sintheta)+2xycostheta+y^2(cos theta+sintheta)=0` is

A

`pi/6`

B

`pi/4`

C

`pi/3`

D

`2theta`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-PAIR OF STRAIGHT LINES-PRACTICE SHEET (EXERCISE-1 Homogeneous pair of line) (LEVEL-I Straight Objective Type Questions)
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  4. The value of lambda " such that " lambdax^2-10xy+12y^2+5x-16y-3=0 repr...

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  11. The equation of a line which is parallel to the line common to the pai...

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  12. Area of the triangle formed by the lines 3x^(2)-4xy+y^(2)=0, 2x-y=6 is

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  13. The area (in square units ) of the triangle formed by x+y+1=0 and the ...

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  14. The area (in square units ) of the triangle formed by x^2-3xy+2y^2=0 ...

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  15. The orthocentre of the triangle formed by the line x^2-3y^2=0 and the ...

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  16. The circumcentre of a triangle formed by the line x^2-y^2=0 and y-5=0...

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  17. The area of the square formed by lines 6x^2-5xy-6y^2=0 and 6x^2-5xy-6y...

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  18. The area of the triangle formed by the straight line x + y = 3 and the...

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  19. Area of quadrilateral formed by two pair of lines a^(2)x^(2)-b^(2)y^(2...

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  20. If 3x^(2)-11xy+10y^(2)-7x+13y+k=0 denotes a pair of straight lines, t...

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