see the picture attaced and many thanks to people who will help me solve this problem and the other problems I have posted before. I really appreaciate the contributors very much.I give thanks to everyone that answer to my question

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- Aug 15th 2008, 06:59 PMhelloyingtriangle problem
see the picture attaced and many thanks to people who will help me solve this problem and the other problems I have posted before. I really appreaciate the contributors very much.I give thanks to everyone that answer to my question

- Aug 15th 2008, 08:16 PMo_O
You can find by extending O to AB, thereby bisecting it. Now, recall that a circle's tangent forms a right angle with its radius at their point of intersection - i.e. . You can then find .

Now extend a horizontal line from the middle of AB (call this point S) to point T (again bisecting AB to form AS and SB). Now we have a right triangle, . You can then use trigonometry to find TA since: