1. Suppose there are two circles where the radius of one circle is twice the radius of the other circle. Each circle has an arc where the measures of the corresponding central angles are the same. What is the relationship between the arc lengths in the two circles? Explain. 2. How are the intervals similar where the graphs of y=sinx and y=cosx are increasing and where the graphs for y=sinx and y=cosx are decreasing? How are they different?