Scientific Calculator 2

This Scientific Calculator not only allows you to calculate with enhanced functions, but also to graph different functions.

How to Start

Open Applications Desktop by pressing <Enter> in the Main Desktop on the icon "Apps". Choose Scientific Calculator 2 icon by <Arrows> and press <Enter>. The Scientific Calculator 2 intro screen will appear. If you want to close the intro screen before it ends, press any key (except <Esc>) and the intro screen will disappear.

How to Operate

You'll see the Scientific Calculator screen (see Fig. 1).

How to Calculate

Use <Left/Right arrows> to select the function groups.

Keys used in all groups

CE button clears the displayed number.
C button clears the current calculation.
e Button allows the entry of scientific notation numbers.

Note: Using <->,<+>, </>, <*> keys will switch to the arithmetic group.

Keys of function group

Trigonometric input selection keys

<D> for degrees ("d" is displayed).
<A> for radians ("r" is displayed).
<S> for centigrade ("g" is displayed).

How to Graph

Press <Z> to open graph-creating screen.

Graph Type

You'll see the "Select Graph Type" screen (see Fig. 2).

Number of functions on the graph

To define the number of functions you want to graph, use <Right arrow>, <Enter> or <Tab> to switch to the edit field of the "Number of Function". Type a number from 1 to 10 using the numeric keys. Press <Enter> to accept the number. Press <Esc> to reject the number.

Type of function

You can define one type of functions to graph; you may have several functions but all they have to be of one type:

Y(X) - to graph simple function. For example, Y(X)=sin(x) - sinusoid function.

Y(T), X(T) - to graph parameter function with parameter T.

R(A) - to graph function in polar coordinate where a is an angle in radians, value of function R is the radius. For example, R(A)=4 will graph a circle with radius 4; R(A) =a will graph a helix.

R(T),A(T) - to graph parameter function in polar coordinate with parameter T.

To define a type of function you want to graph, use <Up/Down arrows> and press <Enter>, and you'll see the next screen.

Parameters and Functions Defining Screen

This screen (see Fig. 3) consists of:

Function field - upper string;

Parameters field - left part of the screen;

Functions list field (available while editing the function field) - right part of the screen.

Button "Graph" to graph functions with entered parameters.

Use <Tab> to switch between the function field, parameters field and the button.

Function field

Press <Enter> or <Right arrows> to switch to the edit string.

Type the function using alpha-numeric keys
or
Press <Tab> to enter to the list of standard functions. Select function from the list using <Up/Down> and pressing <Enter>.

Use all the usual editing keys:

To move in the edit string, use <Left/Right arrows>;
To delete a character, move the pointer to it and press <Del> etc.

Press <Enter> to accept the entered function. Press <Esc> to reject it.

Note: Don't forget to enter the arguments of functions. When you load a function from the list, it looks like, for example sin() - without arguments. You have to put a proper argument in brackets.

Your function can be complicated, compounded with existing simple functions from the list using standard arithmetic operators. For example, you can enter function sin x+sinh x/(2-x2) as: sin(x)+sh(x)/(2-pow(x,2)).

There are two functions of two arguments:

Parameters

Here you have to define parameters of your graph: minimum and maximum values, step of your functions.
Use <Up/Down arrows> to select a parameter.
Use <Right arrow> or <Enter> to switch to the edit string.
Use numeric keys (and "-" if needed, "." as decimal point ,"e" for exponent) to enter a parameter.
Press <Enter> to accept a change, press <Esc> to reject it.

To graph the function(s) select the "Graph" button and press <Enter>.

If the parameters you've entered are correct, you'll see the graph(s). Otherwise, you'll see the pointer at the place of probable error.

Graph Screen

Here you see graph of functions you've defined (see Fig. 4).

Press <I> to switch on/off the informational mode.

In the informational mode, you can see the pointer on the graph and its coordinates.

In informational mode

Use <Arrows> to move the pointer.
Use <Fn><Up/Down arrows> to switch between functions (if you have several functions).
Use <Fn><Left/Right arrows> to move by the points of function.
Press <Shift><Left/Right arrows> to find the point on a graph with same y-coordinate as the pointer.
Press <Shift><Up/Down arrows> to find the point on a graph with same x-coordinate as the pointer.

Task Menu

If you press <F1> while in the application, you will see the task menu.
At the upper part of this menu you'll see the list of tasks that are available at present time.
Use <Up/Down arrows> to choose a task.
Press <Enter> or <Select> to run it.
At the bottom you'll see the "Exit" option. If you choose it, you exit the application.

How to Exit

Press <Esc> as many time as need to load main calculator screen and then press <Esc> and select "Yes" in appeared dialog box to exit. Or open the task menu by pressing <F1> button and select "Exit" option.

Key	Operation
<J> (<->)	-
<H> (<+>)	+
<F> (<%>)	/
<G> (< * >)	*
<Enter>, <L> (< = >)	=
<Space>	CE
<Esc> pressed once or <C>	C
Numeric keys	Enter a figure
<.>	Insert a decimal point
<K>	+/-
<X>	e

	Arithmetic	Power and pi	Logarithmic and exponential	Trigonometric	Inverse trigonometric	Hyperbolic	Inverse hyperbolic	Memory
<Del>	-	X1/Y	eX	cos	arccos	cosh	arccosh	Stores the displayed number in memory (MS).
<Ins>	+	1/X	Log	tan	arctan	tanh	arctanh	Adds the displayed number to the number in memory (M+).
<Tab>	/	XY	Ln	sin	arcsin	sinh	arcsinh	Clears any number stored in memory (MC).
<Select>	*	Pi	10X	cot	arccot	coth	arccoth	Recalls the number stored in memory (MR).