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If the circle  is touched by  at  such that , then the value of  is

a)

36

b)

144

c)

72

d)

None of these



Question ID - 56714 | SaraNextGen Top Answer

If the circle  is touched by  at  such that , then the value of  is

a)

36

b)

144

c)

72

d)

None of these

1 Answer
127 votes
Answer Key / Explanation : (c) -

(c)

The equation of the line  in distance form is , whose

For point . Therefore, coordinates of  are given by

Since  lies on  therefore

    …(i)

Since  touches the circle, therefore the equation  has equal roots

    …(ii)

From (i), we get

127 votes


127