Steps  Key Sequence  Screens 
1. Change Mode to Radians  Press MODE  
Press down arrow key three (3) times  
Press right arrow key once  
Press 1 (for RADIAN)  
Press ENTER (to Save)  
2. Clear Stored Values in Variables  Press 2^{nd}, then F1 (to select F6) 

Press 1 (for Clear az) 

Press ENTER (to Clear az) 

3. Select tExpand Function  Press F2 (for Algebra menu)  
Press 9 (for Trig submenu)  
Press 1 (for 'tExpand(') 

4. Input Function  
5. Execute  Press ')', then ENTER  
NOTE: If the result contains an arrow at the end of the expression, use up/right arrows to view the rest of the expression. 