Enter the magnitudes and angles of up to 5 vectors, and the spreadsheet graphically adds them, tip to tail, and calculates the x and y components of each vector and of their sum. It also displays the answer in polar form. Select "re-draw arrowheads" to update the display. Excel's scatter plot does not have an "arrowhead" option when connecting points.
This spreadsheet also calculates dot and cross products when the components of the vectors are provided.