User's Manual

BrailleNote Apex QT User Guide
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8.5.5 Announce Memory: SHIFT with R.
This is used to display the value in a memory at any time without affecting the current calculation.
For example, if you press: SHIFT with R followed by 4.
After pressing SHIFT with R, KeyPlus displays "Display Memory?" After pressing 4, KeySoft
displays: "Memory 4: nine point eight."
but this does not affect any calculation in progress, which can continue. To return the display to the
calculation, press ADVANCE or continue entering the calculation.
8.6 Scientific Operations.
Trigonometric, logarithmic and exponential functions are available, as well as squares, square roots,
powers and roots.
8.6.1 Trigonometric Functions.
The trigonometric functions can be calculated in either degrees or radians. To select degrees press
D, to select radians press SHIFT with D. A setting stays in effect until it is superseded by another.
The trigonometric functions provided are:
Sine press CONTROL with T, S. displayed as sin(.
Arc Sine press READ with T, S. displayed as arcsin(.
Cosine press CONTROL with T, C. displayed as cos(.
Arc Cosine press READ with T, C. displayed as arccos(.
Tangent press CONTROL with T, T. displayed as tan(.
Arc Tangent press READ with T, T. displayed as arctan(.
PI press Y.
Use the Announce Key mode to familiarize yourself with the location of the trigonometric keys.
To calculate the sine of 30 degrees, press:
D CONTROL with S 30