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How c1+ c2 comes?is it possible? I think it should be c1ç2

How c1+ c2 comes?is it possible? I think it should be c1ç2

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Grade:12th pass

1 Answers

Waseem khan
33 Points
3 years ago
We know that if a circle cut at 90 it is said to be a circle cut a other circle ORTHOGONALLY The angle b/w the twp circle is given by Cos θ=d²-(r1²+r2²) /2r1 r2 if θ=90 thend²=(r1²+r2²) The cenre of the two circles be (-g1, -f1), (-g2, - f2) So FROM HERE d²=(g2-g1)²+(f2-f1)²r1²+r2²=g1²+f1²-c1+g2²+f2²-c2Solving both we will get 2g1g2+2f1f2=c1+c2

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