if two tangents are inclined at 90 degree are drawn to a circle of radius 6 cm find the length of each tangent
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Answer:
Let PA and PB be the two tangents to a circle with centre O and radius 3
∴∠APO =∠BPO
=> 1/2 ×∠APB
=> 1/2 ×600
=> 30⁰
=> Also, OA⊥AP and OB⊥BP
=> In a right angled triangle OAP,
=> tan30⁰ = 3 / PA
⇒ 1 / √3 = 3 / PA
⇒ PA = 3√3cm
⇒ PA = PB = 33 √ cm
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