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If OA and OB are the tangent from the or...

If OA and OB are the tangent from the origin to the circle `x^(2)+y^(2)+2gx+2fy+c=0 and C` is the centre of the circle then the area of the quadrilateral OCAB is

A

`sqrt(g^2+f^(2)-c)`

B

`sqrt(c(g^(2)+f^(2)-c))`

C

`sqrt(g^(2)+f^(2)-c)/(c)`

D

`sqrt(g^2+f^(2)-c)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-CIRCLE-Exercise 1B(Circle-Line)
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  2. The area of the quadrilateral formed by the tangents from the point (4...

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  3. If OA and OB are the tangent from the origin to the circle x^(2)+y^(2)...

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  4. If the distances from the origin to the centres of three circles x^(2)...

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  5. The equation to the circle which is such that the lengths of the tange...

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  6. If the length of the tangent from (f,g) to the circle x^(2)+y^(2)=6 be...

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  7. The locus of the point the lengths of the tangents from which to the c...

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  8. The locus of the point, the lengths of the tangents from which to the ...

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  9. The locus of the points from which the lengths of the tangents to the ...

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  10. The locus of the point which is such that the lengths of the tangents ...

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  12. The length of the intercept made by the circle x^(2)+y^(2)+10x-12y-13=...

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  13. The intercept made by the circlee x^(2)+y^(2)-2hx sin theta-2ky sin th...

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  14. The extermities of a diameter of a circle have coordinate (-4,-3) and ...

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  15. The length of the chord x+2y=5 of the circle x^(2)+y^(2)=9 is

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  16. The length of the chord x=3y+13 cut off by the circle x^(2)+y^(2)-4x+...

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  17. The equation of the circle with centre (3,-1) and which cuts off a cho...

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  18. The locus of centre of a circle which passes through the origin and cu...

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  19. The equation of the circle which is touched by y=x, has its centre on ...

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