OpenWindows User's Guide

# Scientific Functions

The Calculator has the scientific functions shown in Figure 8-13. This window is displayed when you choose Scientific from the Mode key pop-up menu.

##### Figure 8-13 Scientific Functions

• Press MENU pm the Trig key to access a pop-up menu to set the trigonometric base to Degrees, Radians, or Gradients. The current trigonometric base is indicated by the second item on the mode line.

• Use Hyp as a toggle for setting or unsetting the hyperbolic function flag. This flag affects SIN, COS, and TAN functions. When this flag is set, the word HYP appears on the mode line beneath the numeric display.

• Use Inv as a toggle for setting or unsetting the inverse function flag. This flag affects SIN, COS, and TAN trigonometric functions. When this flag is set, the word INV appears on the mode line beneath the numeric display.

• Use e^x to return e raised to the power of the currently displayed value.

• Use 10^x to return 10 raised to the power of the currently displayed value.

• Use y^x to raise the last number entered to the power of the next number.

• Use x! to return the factorial of the currently displayed value. The factorial function only works for positive integers.

• Use Cos to return the trigonometric cosine, arc cosine, hyperbolic cosine, or inverse hyperbolic cosine of the current value, depending on the settings of the hyperbolic and inverse function toggles. (See Hyp and Inv listed previously.) The result is displayed in the current trigonometric base.

• Use Sin to return the trigonometric sine, arc sine, hyperbolic sine, or inverse hyperbolic sine of the current value, depending on the settings of the hyperbolic and inverse function toggles. (See Hyp and Inv.) The result is displayed in the current trigonometric base (degrees, radians, or gradients).

• Use Tan to return the trigonometric tangent, arc tangent, hyperbolic tangent, or inverse hyperbolic tangent of the current value, depending on the settings of the hyperbolic and inverse function toggles. (See Hyp and Inv.) The result is displayed in the current trigonometric base (degrees, radians, or gradients).

• Use Ln to return the natural logarithm of the currently displayed value.

• Use Log to return the base 10 logarithm of the currently displayed value.

• Use Rand to return a random number between 0.0 and 1.0.

Click SELECT on the Set Default button to make your Appearance, Base, Mode, Display, Accuracy, Contents, Functions, and Style settings the default every time you start a new Calculator.