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If theta is the inclination of a focal...

If ` theta ` is the inclination of a focal chord of ` y^(2) = 4ax` to its axis , then its length is

A

` 4a sin ^(2) theta `

B

`4a cos^(2) theta `

C

`4a sec^(2) theta `

D

` 4a cosec^(2) theta `

Text Solution

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The correct Answer is:
D
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MARVEL PUBLICATION-CIRCLE AND CONICS -MULTIPLE CHOICE QUESTIONS
  1. If P (3a , 2 asqrt(3)) is one end of a focal chord PQ of y^(2) = 4ax...

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  2. If (x1,y1)and (x2,y2) are ends of a focal chord of y^2 =4ax, then valu...

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  3. If theta is the inclination of a focal chord of y^(2) = 4ax to its ...

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  4. If theta is the inclination of a focal chord of y^(2) = 4ax to its ...

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  5. If L and L' are ends of latus-rectum of parabola y^(2) = 4ax whose ...

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  6. If t is a parameter , then locus of a point P (a sin^(2) t, 2a sin...

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  7. Equation of parabola ,having (4,-8) and (4,8) as ends of its latus-rec...

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  8. Tangent to y^(2) = 4ax at its vertex is

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  9. Foot of the directrix of the parabola y^(2) = 4ax is the point

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  10. If A (x(1) , y(1)) " and B" (x(2), y(2)) are point on y^(2) = 4ax , ...

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  11. If A (t(1)) " and " B(t(2)) are points on y^(2) = 4ax , then slope ...

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  12. Points A,B ,C , D on y^(2) = 4ax have parameters t(1) , t(2), t(3), ...

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  13. Points A,B,C,D, on y^(2) = 4ax have parameters t(1) , t(2), t(3) , ...

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  14. If PQ is a focal chord of parabola y^(2) = 4ax whose vertex is A , t...

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  15. If focal distance of a point P on y^(2) = 8x is 4, then P is

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  16. If focal distance of point P on y^(2) = 4x is 6, then P is

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  17. An equilateral triangle is inscribed in y^(2) = 8x so that one angul...

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  18. If (4,0) is the vertex , and Y-axis the directrix of a parabola , then...

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  19. The angle subtended by the double ordinate of length 8a of the parabol...

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  20. If points (au^(2), 2au)'" and " (av^(2) , 2av) are ends of a focal c...

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