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→Hints for difficult problems
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== Problem-1==
== Problem-1==
#Tanjents AP and AQ are drawn to circle with centre O, from an external point A. Prove that ∠PAQ=2.∠ OPQ <br>
#Tanjents AP and AQ are drawn to circle with centre O, from an external point A. Prove that ∠PAQ=2.∠ OPQ <br>
−[[File:fig1.png|400px]]
+[[File:fig1.png|200px]]
== Ex 4.4.2==
== Ex 4.4.2==