HP 20B manual Math s Menu, Keys Description

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Mathematical Calculations

For example, to calculate 6 , press 6:n. The result of 2.45 is calculated immediately and displayed on the bottom line. The square root symbol ( ) appears on the top line.

Note: before doing any trigonometric calculations in the Math menu, check whether the angle mode is set for degrees

(Degrees) or radians (Radians). You will need to change the setting if the active mode is not what your problem requires. For more information on the Mode menu and calculator settings, refer to the section titled, The Mode Menu: Setting Preferences in Chapter 1.

Table 2-4 lists one-number functions along with their corresponding keys.

Table 2-4Shifted Function Mathematical Operations

Keys

Description

:p

Calculates sine.

 

 

:q

Calculates cosine.

 

 

:r

Calculates tangent.

 

 

:k

Calculates natural log.

 

 

:l

Calculates natural exponent to the power of x.

 

 

:m

Calculates square of x.

 

 

 

:n

Calculates square root.

 

 

:f

Executes the Random function. Returns a random number in the range 0 < x <1.

 

 

:g

Calculates factorial of x (where -253 < x ≤ 253). The Gamma function is used to calculate x! for

 

non-integers or negative numbers.

 

 

:h

Calculates y to the x power.

 

 

:i

Calculates the reciprocal.

 

 

:d

In Chain or Algebraic mode, recalls the result of the last operation. In RPN mode, returns the

 

content of the Last Number variable.

 

 

:e

Rounds x internally to the number specified by the display format.

 

 

The Math :s Menu

There are additional functions available in the Math menu. To open the Math menu, press :s. See Figure 8 for the

menu map of the Math menu.

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Contents HP part number F2219-90201 First edition August HP 20b Business Consultant Financial Calculator ManualRevision History Legal NoticesRevision History Legal NoticesContents Bonds Business ProblemsTime Value of Money Cash FlowsIndex ErrorsWarranty, Regulatory, and Contact Information Keyboard Map Legend FeatureFeature Chapters HP 20b Business Consultant KeyboardSelecting a Language Basic FeaturesAdjusting the Display Contrast Basic FeaturesTwo Line Display Mode Menu Setting PreferencesSetting top line Description Basic Features 1Mode Menu SettingsKeys Display Description Changing the Calculation ModeAnnunciators Key Presses and the Secondary Function Key= Key Using the I and = KeysI Key Memory and the Memory Menu Reset x MenuEditing and Clearing Entries On/CE O Key Accessing Menus and Menu Maps Menu Map for the Break-even Menu Number Entry and Display Mathematical CalculationsMathematical Functions Algebraic Mode Chain ModeRPN Stack Reverse Polish Notation RPN ModeO1c23 I56c1 Last NumberU3I RPN Stack 3I4+5I6+ Mathematical Calculations 2Last NumberKeys Display Description RPN Stack RPN Stack and the Roll Down Operation One-Number Functions and the Math MenuKeys Description Math s MenuMenu Map for the Math Menu Ior = Probability Sub-menuMathematical Calculations 5Math Menu Example 7Inverse Probability Example Two-Number Functions10I 10I 12IStoring and Recalling Numbers Rounding Numbers Recall ArithmeticStoring and Recalling with Time Value of Money TVM Keys Recalling a Menu Item Value in a MenuPage Time Value of Money TVM Keys Time Value of MoneyTime Value of Money Calculating Payments on a Loan 360 N1400 00VMenu Item/Key Description AmortizationTime Value of Money 2TVM Example Creating an Amortization Schedule 10Y1400 00V Interest Conversion Menu Using the Interest Conversion MenuTime Value of Money 6Interest Rate Conversion Example Canadian Mortgages TVM Canada365 Page Canadian Mortgage Example O300N 6Y350 00VCash Flows Cash Flow DiagramCash Flow Amount Cash Flow ExampleKey Description 4000I 80005000I 4500ICash Flows 2Cash Flow Example 115000Analyzing Cash Flows IRR% NPV and IRR Menu ItemsCash Flows 4NPV and IRR Example Editing Cash FlowsSample Cash Flow Diagrams Bond Menu BondsBond Menu Items 20102020 Bond Calculation ExampleBonds 2Bond Calculation Example +L1=Date Calculation Example Date CalculationDate Calculation Menu Date Calculation 1Date Calculation Example 10.3 12010Break-even Menu Break-evenBreak-even 1Break-even Example Percent Calculation Menu Business Problems35I 15I22I 20I30I What is 30% of 80? 4Part % of Total Example80I Depreciation Menu DepreciationDepreciation Method Description Sline 1Depreciation Methods2Depreciation Menu Items Depreciation Menu Items 1000500 Depreciation ExampleDepreciation 3Straight Line Depreciation Example Menu Maps for the Data and Statistics Menus Statistical OperationsData and Stats Menus Menu Item Description Statistical Operations 1The Statistics Menu Items4I1 75I 1I1 50I2I1 65I 3I1 60IStatistical Operations 3Statistics Example 5I1 70I1Error Messages ErrorsError Messages and Calculator Status Error Message Status Replacing the Batteries Warranty, Regulatory, and Contact InformationHP Limited Hardware Warranty and Customer Care Customer Care Ireland 01 605 Italia 02 754 19 210 969Honduras Hong Kong 香港特別行政區 852 India +65 6100Singapore 6100 877 232495 228 01 439Avis Canadien Product Regulatory & Environment InformationModifications Canadian NoticeChemical Substances Pbde Calendar Actual, Cal.360 IndexOff calculator off