 | Mathematical recreations - 1774 - 734 pages
...• • . • * The reftangle under the two diagonals of any trapezium drawn into twice the cofine.of -the angle contained by them (the radius being i)...is equal to the difference of the aggregates of the fquares of the oppofue fides of the trapezium i and the area of the trapezium is equal to one fourth... | |
 | Ladies' diary - 1775 - 498 pages
...by Mr. T. Mofs. The rectangle under the two diagonals of any trapezium drawn into twice the cofine of the angle contained by them' (the radius being...equal to the difference of the aggregates of' the fquares of the oppofite fides of the trapezium ; and the area of the trapezium is equal to one-fourth... | |
 | Charles Hutton - Mathematics - 1775 - 446 pages
...Mofs. The rectangle under the two diagonals of any trapezium drawn into twice the cofine of the anple contained by them (the radius being i) is equal to the difference of the iggro gates of the fquares of the oppofite fides of the trapezium; and and the area of the trapezium... | |
 | Thomas Leybourn - Mathematics - 1817 - 468 pages
...diagonals of any trapezium drawn into twice the cosine of the angle contained by them (the radius being 1) Is equal to the difference of the aggregates of the squares of the opposite sides of the trapezium : and the area of the trapezium is equal to one-fourth of the same... | |
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What number of fhecp did he buy? VII. QUESTION 427, by Mr. T. Mofs. The rectangle under the two diagonals of any trapezium drawn into twice the cofine of the angle contained by them' (the radius being i) is equal to the difference of the aggregates of... 