Pls answer the question.plz plzzzzzz tmrw exam. And plz dont use the tangent secant preperty. Plz our school had omitted the theorem. Plzzzzzz. Plz solve the 19th sum.
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I hope this helps.
PT² = PO² - OT² [ using Pythagoras' Theorem since ∠PTO is a right angle ]
= PO² - OA² [ OA = OT since these are radii ]
= PO² - ( ON² + AN² )
= ( PO² - ON² ) - AN²
= PN² - AN²
= ( PN - AN ) ( PN + AN )
= ( PN - AN ) ( PN + BN ) [ AN = BN since the perpendicular ON of isosceles triangle OAB bisects side AB ]
= PA . PB
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