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Let P Qa n dR S be tangent at the extrem...

Let `P Qa n dR S` be tangent at the extremities of the diameter `P R` of a circle of radius `rdot` If `P Sa n dR Q` intersect at a point `X` on the circumference of the circle, then prove that `2r=sqrt(P Q x R S)` .

A

`sqrt(PQ.RS)`

B

`(PQ+RS)/(2)`

C

`(2PQ.RS)/(PQ+RS)`

D

`sqrt((PQ^(2)+RS^(2))/(2))`

Text Solution

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The correct Answer is:
A
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