If -chord of a circle be that chord which subtends an angle at the centre of the circle

MATHEMATICS · Single correct · CBSE · Mathematics · Conic Sections · Conic Sections

Problem

\alpha

-chord of a circle be that chord which subtends an angle

\alpha

at the centre of the circle. Distance of

\frac{2\pi}{3}

-chord of

x^2 + y^2 + 2x + 4y + 1 = 0

from the centre is (1)

\frac{1}{\sqrt{2}}

(2) 1 (3)

\sqrt{2}

(4) 2