



 
Hi Doug. Remember that a line that is tangent to a circle is perpendicular to its radius at the point of tangency. That means that when you draw this, you get rightangled triangles. That let's you solve the problem using simple trig functions like sine, cosine and tangent and use the Pythagorean Theorem as well. Try drawing it and you will see at once what I mean. Stephen La Rocque.>  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 