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From any point on the circle x^(2)+y^(2)...

From any point on the circle `x^(2)+y^(2)+2gx+2fy+c=0` tangents are drawn to the circle `x^(2)+y^(2)+2gx+2fy+c sin^(2) alpha +(g^(2)+f) cos^(2) alpha=0`. The angle between the tangents is

A

`alpha`

B

`2alpha`

C

`4alpha`

D

`alpha//2`

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Verified by Experts

The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-CIRCLE-Exercise 1C(Pole, Polar)
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  13. The parametric equation of the circle x^(2)+y^(2)+8x-6y=0 are

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  14. The equation of the circle passing through the point (-1+3 cos theta, ...

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  15. Show that the locus of the point of inter section of the lines x cos t...

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  16. If x=-2+3 cos theta, y=1+3 sin theta then the locus of the point (x,y)...

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  17. The parametric equation x=2a((1-t^(2)))/(1+t^(2)) and y=(4at)/(l+t^(2)...

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  18. If a straight line through C(-sqrt8,sqrt8) making an angle 135^(@) wit...

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  19. The locus of the point of intersection of the tangents to the circle x...

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  20. Equation to the tangent at (a(1+cos alpha), a sin alpha) on the circle...

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