This online Sum of Squares Calculator performs calculation of the sum of squares of a set of arbitrary real numbers or the sum of squares of a set of consecutive integer numbers.
This online Trigonometric Functions Calculator computes trigonometric functions of a complex number (variable).
This online calculator is intended for calculation of the weighted average (or weighted arithmetic mean) of a set of data. It computes also the number of input values (data set size) and total of the weights.