- Solution of a system of 3 linear equations
Solution of a system of 3 linear equations with 3 variables

- Solution of buckets and tank problem
This online calculator find a solution to the question how to fill tank with certain amount of water using two buckets of different size

- Solution of nonhomogeneous system of linear equations using matrix inverse
Solution of nonhomogeneous system of linear equations using matrix inverse

- Solution of quadratic equation
Solution of quadratic equation, including complex roots

- Solving limit problems using L'Hospital's Rule
Solving 0/0 and ∞/∞ limit problems using L'Hospital's Rule.

- Sphere

Calculator computes tank volume given its length, diameter and walls depth. Created by user's request.

- Spherical cap and spherical segment
This calculator computes volume and surface area of spherical cap and spherical segment

- Spherical sector
Calculates surface area and volume of Spherical sector by radius and height

- Student t-distribution
Calculates cumulative distribution function value and probability density function value for Student t-distribution. Quantile calculator evaluates Student quantiles for given probability and specified number of degrees of freedom.

- Surface area of a cube

Calculator computes the diagonals of a parallelogram and adjancent angles from side lengths and angle.

- The greatest common divisor and the lowest common multiple of two integers
This calculator finds the greatest common divisor (GCD) and the lowest common multiple (LCM) of two integers

- The greatest common divisor of two integers
This calculator determines the greatest common divisor of two integers using Euclidean algorithm

- Tips and tricks #8: How to reuse existing calculator
This article describes process of reusing another calculator's logic (algorithm) in your calculator.

- Torus
Volume and surface area of torus.

- Total square
This calculator calculates total square as sum of squares of entered rectangles

- Total volume
This calculator calculates total volume as sum of volumes of entered rectangular parallelepipeds.

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

- 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.

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