Solving for radius in terms of two unknowns

Here is the problem: S and T are the centers of their respective circles. The two circles are mutually tangent at pointo U. If segment RS=d, what is the radius of the smaller circle in terms of d and theta? The answer is d(cosx-sinx) (x is theta)

I don't understand this problem at all. Where do I label R on the graph??

Re: Solving for radius in terms of two unknowns

Quote:

Originally Posted by

**benny92000** Here is the problem: S and T are the centers of their respective circles. The two circles are mutually tangent at pointo U. If segment RS=d, what is the radius of the smaller circle in terms of d and theta? The answer is d(cosx-sinx) (x is theta)

I don't understand this problem at all. Where do I label R on the graph??

No picture given at all?

Re: Solving for radius in terms of two unknowns

None at all. It's quite possibly the book's mistake, but I just wanted to make sure..