IIT JEE , AIEEE Forum - Mathematics , Analytical Geometry

raulrag009

The centre of a set of circles, each radius 3,lie on the circle x^2+y^2=25.

the locus of any point in the set is ??

pls help

feynmann

ans

x^2 + y^2 - 6x ( cos

+ sin

) = 16 (

is a parameter )

deeplove

As the region is contaminated by the two circles whose centers are at origin and radii = 2 and 8,

Hence the equation is 4<= x² + y²<= 64 .....................................ANS.

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