HP 33s - Manual (Page 109)

Entering and Evaluating Equations 6–17
Single
letter
name
No implied
multiplication
Division is done
before addition
Parentheses used to group items
P=A+B+Hx(1 SIN(T)+1 SIN(F)) Ί Ί
The next equation also obeys the syntax rules. This equation uses the inverse
function, #1 1!22, instead of the fractional form, ª 1!2. Notice that
the SIN function is "nested" inside the INV function. (INV is typed by
 .)
/--º1#1 1!22-#1 1222
Example: Area of a Polygon.
The equation for area of a regular polygon with n sides of length d is:
Area =
/n) sin(
) / cos(
4
1
π
π n
n d 2
d
2 /n π
You can specify this equation as
/
)ºº:º 1
πª2ª 1πª2
Notice how the operators and functions combine to give the desired equation.
You can enter the equation into the equation list using the following keystrokes:
| H L A | ’ .25 z L N z L D 2 z R |
N q L N | ` q O | N q L N | ` ‘