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6-18 Entering and Evaluating Equations
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 =
You can specify this equation as
ππ
Notice how the operators and functions combine to give the desired equation.
Parentheses used to group items
Single letter
name
Optional explicit
multiplication
Division is done before
addition
/n)sin(
)/cos(
4
1
π
π n
n d
2
d
2/n
π