- Trigonometric functions
This online calculator computes the values of elementary trigonometric functions, such as sin, cos, tg, ctg, sec, cosec for an angle, which can be set in degrees, radians, or grads.

- Usable volume of tank
This calculator find usable volume of tank, taking into account wall thickness

- Values of one-variable function
This online calculator calculates values of one-variable function given function formula and set of variable values

Calculates volume of the cylinder segment

- Vigenère cipher
Calculator encrypts entered text by using Vigenère cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed.

- VOIP call bandwidth
The calculator works out bandwidth required to handle given number of VOIP calls with given audio codec.

- When it becomes profitable to pay the tax as a sole proprietor?
The calculator allows you to compare the taxes paid by an sole proprietor in the simplified taxation system and the individual.

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