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0 votes
6.5k views
in Co-ordinate geometry by (63.5k points)

In an isosceles ∆ ABC, if the altitudes intersect on the inscribed circle then find the secant of the vertical angle ‘A’.

1 Answer

+1 vote
by (64.8k points)
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Best answer

OD = 2r

secA = ? = we need to find

OA = 2R cosA

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