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Number of square-triangle has the properties of a square and a triangular number.
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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 by entering an angle in degrees or radians calculated values of the basic trigonometric functions.
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The calculator calculates the amount of VAT that can be refunded in respect of incurred expenses associated with the purchase of construction materials.