... changewith constant rate of change, 712–714difference between left- and right-handsums and, 718–722explanation of, 712with nonconstant rate of change, 715–718overview of, 711–712Newton, ... integralsexplanation of, 903infinite interval of integration and, 903–907method of comparison and, 912–914methods to approach, 908–912unbounded and discontinuous integrands and, 907–908use of, 903Increasing ... 890–894Trigonometryangles and arc lengths and, 619–624applied to general triangle, 657–665Index 1135evaluation of, 763explanation of, 725–727finding exact area and, 727–729finding mass when density varies and, 827–838fluid...