- Tilted cylindrical tank volume
Calculates volume of cylindrical tank tilted at an angle. To perform calculation you must provide the tank size, angle and liquid level.

- 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

This calculator computes triangle angles for given triangle sides using cosine law

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

- 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.

- Volume of the cylinder segment
Calculates volume of the cylinder segment

- 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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