Calcline is a mathematical tool for Mac only, optimized for Mac OS X 10.5 (Leopard)
It is easy to use and is the ideal substitute of the ancient desktop calculator.
You simply digit an expression and it displays the result

Calcline starts as a small window utility.
It's very simpleto use. Just insert a mathematical expression to evaluate and Calcline will do the work.
Expression can be very easy such as:
42+110+25+44+32+25
This is really a simple task and in that way you are using Calcline as a substitute of the standard calculator.

Expressions can also be much more complex, with a lot of nested parentheses and functions.
For example you can type an equation such as:
23*(cos(1.875)-0.0025*0.001)+tan(0.258+0.025*2)
and Calcline will solve it and, if you lik,e showing it step by step.
Using trigonometric formula you can use the Deg or the Rad modality as in any advanced calculator. You can insert functions using the ƒ popup immediately above the input field without having to remember it.

Calcline can be used in this compact view or using an extended view.
The extended view shows, above the input field, a board in which Calcline displays the expression solved step by step. This allows to verify how Calcline solves expressions as if you do them by hand.

Using Calcline it is possible to specify and create on the fly an unlimited number of variable values. A Drawer which can slide out from the Calcline window shows a table with all the created variables. The variables can be used in calculation. In that way you can type
23*(cos (ax)-rs*tx)+tan(Xpt+Gtr*2)
and if all the variables where defined Calcline will calculate the expression.
Best of all in the board you will see the substitutions of the variable one by one and then how the expression is solved.

Creating variables in the table is easier than saying it. Not only you can use the add button to add a new variable, and clicking it you can edit in place inside the table but even you can create new variable form the edit field in an simple way.
If you digit
ax= 1.875
in the edit field, automatically Calcline will add the variable ax to the table and will assign the value of 1.875. After that you can use the variable in successive calculation.

If a variable is already inside the table and you redefine it, the new value will be updated in the table.

You can even assign to a variable the result of complex expression including other variable names such as:
bx=tg(0.0023+arcsin(0.21225)+0.22*2.5+ax+pi/12)
Calcline predefines for you some constant value such as
pi = 3.141592653589793
and others