http://i46.photobucket.com/albums/f1...schic/0000.jpg

Line segment BA is tangent to the circle at A. CF is tangent to the circle at F. Express the length of DE in terms of θ.

Thanks so much.

I know it is 4(some identity)θ???

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- November 7th 2008, 08:06 PMdaydreembelievrcircle, tangent
http://i46.photobucket.com/albums/f1...schic/0000.jpg

Line segment BA is tangent to the circle at A. CF is tangent to the circle at F. Express the length of DE in terms of θ.

Thanks so much.

I know it is 4(some identity)θ??? - November 7th 2008, 08:26 PMSoroban
Hello, daydreembelievr!

Quote:

http://i46.photobucket.com/albums/f1...schic/0000.jpg

Line segment is tangent to the circle at

is tangent to the circle at

Express the length of in terms of

In right triangle

But is a radius of the circle: .

Therefore: .