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Number of tetrahedral

Tetrahedral numbers are the natural numbers, for which it is possible to construct a tetrahedron formnego of bullets. They are a special case of the pyramidal numbers.        


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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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The program generates the prime numbers in a given range using the sieve of Eratosthenes algorithm.        
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Calculate how much you drink pure ethanol

On the basis of the data entered, the amount of drink and the percentage of alcohol content calculator calculates pure ethyl alcohol that we consume.