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The harmonic mean

Calculator based on the entered numbers separated by commas calculate the harmonic mean.        

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Conversion between number bases

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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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Perpetual calendar

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The program generates the prime numbers in a given range using the sieve of Eratosthenes algorithm.        
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Circumference of an ellipse

The calculator calculates the circumference of an ellipse for a given length of the axis passing through it.