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Number of square-triangle has the properties of a square and a triangular number.          


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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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Calculator allows you to calculate the amount of insulation panels needed to cover the walls of the building using the "light wet" or "dry light" methods.
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Generates a message using SHA-2 algorithm.
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Calculator specified key encrypts the text using the Caesar cipher. Are accepted only letters, other characters are ignored.