Graphing the functions
y = 2 sin(x/2) and y = x + 1/x

  • If a formula is already entered for Y1, clear it by pressing the CLEAR key (circled in green).

  • Use the Variable key to enter the formula
    2 sin(x/2) for Y1. Press the ENTER key.

  • Clear the formula from Y2 if necessary. Enter x + 1/x for Y2, and press the ENTER key.

  • Clear any of the other functions (Y3 - Y8) using the ARROW and CLEAR keys.

  • Press the ZOOM key (circled in red), then press 4 to see the graphs of the two functions you entered.