•Grades: There are 400 grades (400 g) in a complete circumference.

The angle measure affects the trig functions like SIN, COS, TAN and associated functions.

To change the angle measure mode, use the following procedure:

•Press the Hbutton. Next, use the down arrow key, ˜, twice. Select the Angle Measure mode by either using the \key (second from left in the fifth row from the keyboard bottom), or pressing the @CHOOSE soft menu key ( B). If using the latter approach, use up and down arrow keys,— ˜, to select the preferred mode, and press the !!@@OK#@ F soft menu key to complete the operation. For example, in the following screen, the Radians mode is selected:

Coordinate System

The coordinate system selection affects the way vectors and complex numbers are displayed and entered. To learn more about complex numbers and vectors, see Chapters 4 and 8, respectively, in this Guide. There are three coordinate systems available in the calculator: Rectangular (RECT), Cylindrical (CYLIN), and Spherical (SPHERE). To change coordinate system:

•Press the H button. Next, use the down arrow key, ˜, three times. Select the Coord System mode by either using the \ key (second from left in the fifth row from the keyboard bottom), or pressing the @CHOOSE soft menu key ( B). If using the latter approach, use up and down arrow keys,— ˜, to select the preferred mode, and press the !!@@OK#@ F soft menu key to complete the operation. For example, in the following screen, the Polar coordinate mode is selected:

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