Precise Calculator is a free programmable scientific calculator with basic functions like algebra, geometry, logarithms and base conversion. Also, statistic calculations like standard deviation and regression
then click on "Macro" in the Precise Calculator toolbar
click on "new" and name the macro "cylinder", then click on
OK. You have saved your first program.
Next time when you open the calculator, click on macro and
then click on "cylinder" to open the program.
fig. 1 Precise Calculator main screen
There should be assignments to variables at the beginning of a formula.
Example: volume of a cylinder can be written as r=6; h=4; print "volume=" pi*r^2*h.
Then you can use the computer keyboard shortcuts Ctrl+1 and Ctrl+2 to easily change the values of the
variables r and h. You can choose a file for the macros in the File / Savemacros as (choose the
name for the macro) then click "save". Or you can click on Macro / New then Name of macro: (choose
the name of the macro) then click "OK".
fig. 2 Cylinder Macro
The first edit box after the label "Precision:" holds number of significant digits. The second edit box is visible only in the Fix mode and means maximal number of digits after the decimal point. The checkbox "a/b" enables or disables fractions in the result. A numerator and a denominator are 32-bit integers (approximately 9 digits).
round = round to nearest interger round 3.78 = 4 gcd = greatest common devisor nCr = combination frac = fractional part frac 3.78 = 0.78 lsh = shift left sqrt = square root exp = exponential function ln = natural logarithm base e = 2.71828... log = common logarithm base b = 10 sin = sine, (opposite side/hypotenuse) cos = cosine, (adjacent side/hypotenuse) tan = tangent, (opposite side/ adjacent side) abs = absolute value ^ = power
fig. 3 Precise Calculator Keypad
To access the alternate keys on the calculator keypad, hold down the "Shift" key on the computer keyboard then press the "listed key" on the calculator keypad, or check Inv to change the keypad.
int = round down trun = interger part trun 3.78 = 3 ^2 dms converts degrees, minutes & seconds to degrees sign ceil = round up not ^3 asin real = real part lcm = lowest common multiple xor exp = 10^ acos imag = imaginary part
fig. 4 Precise Calculator Alternate Keypad
To access the alternate keys on the calculator keypad, hold down the "Shift" key on the computer keyboard then press the "listed key" on the calculator keypad, or check Inv to change the keypad.
= x= ave( = mean, ave= sum/count x²= aveq( = mean of squared values SD= stdev( = standard deviation Σ= sum( = total sum Σx²= sumq( = sum of squared values var( = variance, var=(sumq-sum^2/count)/(count-1) min( = minimum value max( = maximal value med( = median, middle value rand= random number count(x)= number of items in list (x) mod= remainder goto= jump to a label i
You can create submenus in the menu Macro. Rename a macro and use the backslash character to separate a submenu name and an item name. Submenus can be nested to any depth.
Example: 3-D\Cylinder Macro name: 3-D macro submenu: Cylinder
fig. 6 Macro submenu
Macros (programs) of 3-D figures
CYLINDER (do not copy title "CYLINDER")
H=4; R=6; print "Cylinder";
print " volume= ",pi*R^2*H;
print " surface area= ",2*pi*R*(R+H); print ""; print
" H= height of cylinder"; print " R= radius of cylinder"
-
Cylinder (solution: do not copy)
volume= 452.3893421
surface area= 376.9911184
H= height of cylinder
R= radius of cylinder
SPHERICAL CAP (do not copy title "SPHERICAL CAP")
r=6; h=3; print "Spherical Cap"; print " volume=",(pi/3)
*h^2*(3*r-h); print " surface area=", 2*pi*r*h; print
"";print " r= radius of cap"; print " h= height of cap"
-
Spherical Cap (solution: do not copy)
volume= 141.3716694
surface area= 113.0973355
r= radius of cap
h= height of cap
CONE (do not copy title "CONE")
R=6; H=4; print "Cone"; print " volume=", pi*R^2*H/3;
print " surface area=", pi*R^2+pi*R*sqrt(R^2+H^2);
print ""; print " R= radius"; print " H= height"
-
Cone (solution: do not copy)
volume= 150.7964474
surface area= 249.0234163
R= radius
H= height
SPHERICAL CONE (do not copy title "SPHERICAL CONE")
r=4; h=3; R=6; print "Spherical Cone"; print "
volume=",2/3*pi*R^2*h; print " surface area=", pi*R*
(2*h+r); print ""; print " R= radius of sphere"; print "
r= radius of cone"; print " h= height of cap"
-
Spherical Cone (solution: do not copy)
volume= 226.1946711
surface area= 226.1946711
R= radius of sphere
r= radius of cone
h= height of cap
PYRAMID (do not copy title "PYRAMID")
L=5; W=6; H=4; print "Pyramid";
print " volume=",L*W*H/3;
print " surface area= ",L*sqrt((L/2)^2+H^2)+
W*sqrt((W/2)^2+H^2)+L*W;print""; print "
L= length of pyramid base"; print "
W= width of pyramid base";
print " H= height of pyramid"
-
Pyramid (solution: do not copy)
volume= 40
surface area= 83.58495283
L= length of pyramid base
W= width of pyramid base
H= height of pyramid
TOPLESS CONE (do not copy title "TOPLESS CONE")
R1=6; R2=3; H=4; print "Topless Cone";
print " volume=",pi*(R1^2+R1*R2+R2^2)*H/3;
s=sqrt((R1-R2)^2+H^2);print " surface area=",pi*(R2*
(R2+s)+R1*(R1+s));print"";print" R1= large radius";
print " R2= small radius";print " H= height"
-
Topless Cone (solution: do not copy)
volume= 263.8937829
surface area= 282.7433388
