when working with a right-angled triangle and trigonometric ratios, the opposite side is the side opposite the angle in question.
the ratio of vertical replacement to the horizontal replacement of a straight line; or the slope...
uses the previous terms of a sequence to compute further terms in the sequence.
a statistical average; the sum of all the values divided by the number of values.
the first non-zero digit in a decimal fraction. It can appear before or after the decimal comma...