Trigonometric Modes. The trigonometric functions operate in the trigonometric mode you select. Specifying a trigonometric mode does not convert any number already in the calculator to that mode; it merely tells the calculator what unit of measure(degrees, radians, or grads) to assign a number for a trigonometric function. NOTE: not yet implemented.
Pressing g DEG sets Degrees mode. No annunciator appears in the display. Degrees are in decimal, not minutes-seconds form.
Pressing g RAD sets Radians mode. The RAD annunciator appears in the display. NOTE: not yet implemented.
Trigonometric Functions. Given x in the display(X-register):