The circles and intersect at an angle of

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

Problem

The circles x2+y2+x+y=0x^2+y^2+x+y=0 and x2+y2+x−y=0x^2+y^2+x-y=0 intersect at an angle of (1) π6\frac{\pi}{6} (2) π4\frac{\pi}{4} (3) π3\frac{\pi}{3} (4) π2\frac{\pi}{2}

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