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In isosceles triangle ABC, if the altitudes intersect on the inscribed circle, then what is the cosine of vertical angle A?

In isosceles triangle ABC, if the altitudes intersect on the inscribed circle, then what is the cosine of vertical angle A?

Grade:11

2 Answers

Arun
25750 Points
5 years ago
Dear Jeet
 
I am getting my answer as cos A = 1/9
Please let me know if this is correct then I will share my solution.
 
Regards
Arun
ABC
12 Points
5 years ago
Yes, the answer is right.
Please privide me full solution.
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