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If the line lx + my = 1 be a tangent to ...

If the line `lx + my = 1` be a tangent to the circle `x^(2)+y^(2)=a^(2)`, then the point `(l, m)` lies on

A

ellipse

B

parabola

C

circle

D

none

Text Solution

Verified by Experts

The correct Answer is:
C
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ML KHANNA-THE CIRCLE -Problem Set (2) (MULTIPLE CHOICE QUESTIONS)
  1. If the line lx + my = 1 be a tangent to the circle x^(2)+y^(2)=a^(2), ...

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  2. The equation of tangents drawn from the origin to the circle x^(2)+y^(...

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  3. Find the angle between the two tangents from the origin to the circle ...

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  4. The condition so that the line (x+g) cos theta +(y+f)sin theta =k ...

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  5. The angle between a pair of tangents drawn from a point T to the circl...

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  6. From any point on the circle x^(2)+y^(2)=a^(2) tangents are drawn to t...

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  7. If from any point P on the circle x^2+y^2+2gx+2fy+c=0, tangents are dr...

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  8. The angle at which the circle x^(2)+y^(2)=16 can be seen from the poin...

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  9. If 3x+y=0 is a tangent to a circle whose center is (2,-1) , then find ...

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  10. The length of the chord of the circle x^(2)+y^(2)=25 joining the poin...

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  11. If the two circles x^(2)+y^(2)+2gx+2fy=0 and x^(2)+y^(2)+2g(1)x+2f(1)...

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  12. Aline meets the co-ordinate axes in A and B.A circle is circumscribed ...

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  13. The tangent to the circle x^(2)+y^(2)=5 at the point (1, -2) also touc...

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  14. P and Q are two symmetrical points about the tangent at origin to the...

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  15. Equation of tangent to the circle x^(2)+y^(2)=50 at the point where th...

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  16. If x+y=2 is a tangent to x^(2)+y^(2)=2, then the equation of the tang...

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  17. To which of the following circles, the line y- x+3=0 is normal at the...

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  18. The slope of the tangent at the point (h, h) of the circle x^(2)+y^(2...

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  19. Find the equations of the tangents to the circle x^2 + y^2 = 169 at (5...

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  20. Equation of a tangent to the circle x^(2)+y^(2)=25 passing through (-...

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