KVPY SA Exam 2013 Question Paper

Question : 7 of 80

Marks: +1, -0

Tangents to a circle at points P and O on the circle intersect at a point R. If PQ = 6 and PR = 5 then the radius of the circle is

Solution:

In ΔRCP ⇒ cosθ =

4/5

In ΔPCO ⇒ cosθ =

3/r

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