A triple integral is an extension of the concept of integration in calculus to functions of three variables. Triple integrals are used to compute the volume or to find the total accumulated quantity over a three-dimensional region.
Triple integrals are calculated by iteratively applying the single-variable integration process. This is typically done by first integrating with respect to one variable while treating the others as constants, and then integrating the resulting expression with respect to the second variable, and finally with respect to the third variable. The order of integration can be interchanged, depending on the problem and the region’s geometry.
In some cases, it is more convenient to use cylindrical coordinates or spherical coordinates instead of Cartesian coordinates for calculating triple integrals. This involves transforming the integrand and the region of integration into the chosen coordinate system and appropriately adjusting the integration limits.
Triple integrals have numerous applications in physics, engineering, and other disciplines, such as calculating the mass of an object with variable density, finding the electric charge in a region, or determining the average value of a function over a three-dimensional volume.