Question

find the equation of the circle with centre (0,0)and which is touching the line y=4
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Answer 1

ANSWER

Equation of circle touching x=0,y=0&x=4

Centre (2,2) & Radius =2

Equation of circle is

(x−a)

2

+(y−b)

2

=r

2

⇒(x−2)

2

+(y−2)

2

=(2)

2

x

2

+y

2

+8−4x−4y=4

x

2

+y

2

−4x−4y=−4

x

2

+y

2

−4x−4y+4=0

4(x

2

+y

2

)−16x−16y+16=0

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