1. A chord of a circle is equal to its radius. A tangent is drawn to the circle at an extremity of the chord. The angle between the tangent and the chord is
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By: anil on 05 May 2019 01.50 am
OA = OB (radii of circle) OA = OB = AB (radii and chord are equal) $$ herefore$$ $$ riangle$$ AOB is an equilateral triangle. => $$angle$$ AOB = $$angle$$ OAB = $$angle$$ OBA = $$60^circ$$ Also, $$angle$$ OBD = $$90^circ$$ => $$angle$$ OBA + $$angle$$ ABD = $$90^circ$$ => $$angle$$ ABD = $$90^circ-60^circ=30^circ$$ => Ans - (A)
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