# Solving for radius in terms of two unknowns

• Nov 14th 2011, 03:33 PM
benny92000
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??
• Nov 14th 2011, 04:15 PM
skeeter
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?
• Nov 15th 2011, 08:05 AM
benny92000
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..