HP 33s hp 33s_user's manual_English_E_HDPM20PIE56.pdf - Page 109
P=A+B+Hx1 SINT+1 SINF, Parentheses used to group items
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Parentheses used to group items P = A + B + H x ( 1ΊS I N ( T ) + 1ΊS I N ( F ) ) Single letter name No implied multiplication Division is done before addition 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 = 1 n d 2 cos(π / n) 4 sin(π/n) d 2π/n You can specify this equation as 1πª2ª 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 | NqLN|`qO|NqLN|` Entering and Evaluating Equations 6-17