HP 35s Scientific manual 18Entering and Evaluating Equations, Area =

Parentheses used to group items

Single letter	Optional explicit	Division is done before
name	multiplication	addition

The next equation also obeys the syntax rules. This equation uses the inverse function, , instead of the fractional form, . Notice that the SIN function is "nested" inside the INV function. (INV is typed by .)



Example: Area of a Polygon.

The equation for area of a regular polygon with n sides of length d is:

Area =	1		2	cos(π /n)
	4 n d			sin(π/n)
		d

2π/n

You can specify this equation as

ππ

Notice how the operators and functions combine to give the desired equation.

6-18Entering and Evaluating Equations