1. Find the length of an arc in a circle of radius10 centimeters subtended by the central angle of 50.Show your work.

2. GraphF(x)=x sin x on [-4, 4] and verbalize how the graph varies from the graphs off(x)= x.

Graphf(x)= sin x/x on the window [5, 5] and describe freely what the graph shows. You can usewww.desmos.com/calculatorto obtain the graphs.

3. A 23-ft ladder leans against a building so that the angle between the ground and the ladder is 80. How high does the ladder reach up the side of the building? Show the steps of your reasoning.