Math Help - Solving for radius in terms of two unknowns

1. 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??

2. Re: Solving for radius in terms of two unknowns

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?

3. 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..