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Examine the variability of the quadratic function

Calculator examines the variability of the course of a quadratic function in the field of real numbers.


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Weighted average ratings

The calculator calculates the weighted average of the ratings of the following items.              
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Trigonometric functions calculator

Calculator by entering an angle in degrees or radians calculated values ​​of the basic trigonometric functions.
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Conversion between number bases

Converter allows you to convert numbers between number bases - binary (binary), trójkowym, czwórkowym, Friday, szóstkowym, siódemkowym, octal (octal), dziewiątkowym, decimal (decymalnym) jedenastkowym, dwunastkowym, trzynastkowym, czternastkowym, piętnastkowym, hexadecimal (hex). Typed characters that are not numbers and the letters A, B, C, D, E, F are ignored.      
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Calculator VAT refund for building materials

The calculator calculates the amount of VAT that can be refunded in respect of incurred expenses associated with the purchase of construction materials.                    
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Calculate the factorial using Stirling's formula.

The calculator calculates the approximate value of the motor using Stirling's formula      
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Weighted average ratings

The calculator calculates the weighted average of the ratings of the following items.