| Thomas Keith - 1810 - 420 sider
...these four logarithms, is the logarithmical sine of half the angle sought. (H. 215.) OR, RULE III. **From half the sum of the three sides subtract each side separately.** Then add together, The logarithmica! co-secants of half the sum of the sides, and of the difference... | |
| Andrew Mackay - 1811 - 138 sider
...easily measured by the above method. In this case, therefore, the three sides are to be measured. Now **from half the sum of the th'ree sides, subtract each side separately;** then extract the square root of the product of half the sum of the sides by the three differences ;... | |
| Edward Riddle - 1824 - 551 sider
...cases, we have the following rules. To find any angle of a spherical triangle when the three sides **are given. RULE 1. From half the sum of the three sides subtract** the side opposite to the required angle, then add together the log cosecants of the other two sides,... | |
| Thomas Keith - 1826 - 442 sider
...these four logarithms, is the logarithmical sine of half the angle sought. (F. 184.) OR, RULE III. **From half the sum of the three sides subtract each side separately.** Then add together, The logarithmical co-secants of half the sum of the sides, and of the difference... | |
| John Bonnycastle - 1829 - 252 sider
...and height 10.25? Ans. 102. 5/e. PROBLEM III. To find the area of a triangle whose three sides only **are given. RULE.* . 1 . From half the sum of the three sides subtract each side** severally. * Demon. Let AC— a, ±3=b, uc=c, and AD=a:; (See preceding fig.) Then, since BD=&— x,... | |
| Ira Wanzer - 1831 - 396 sider
...in Problem III. 2. When the three sides of the triangle are given, the area may be found as follows: **From half the sum of the three sides subtract each side separately** ; then multiply the said half sum and the three remainders continually together, and the square root... | |
| Ireland commissioners of nat. educ - 1834
...feet Gi inches. PROBLEM V. Having the three sides of any Triangle given, to find its orea. RULE I. **From, half the sum of the three sides subtract each side separately,** then multiply the half sum and the three remainders together, and the square root of the last product... | |
| Commissioners of National Education in Ireland - 1837 - 262 sider
...feet 6^ inches. PROBLEM V. Having the three sides of any Triangle given, to find its area. RULE I. **From half the sum of the three sides subtract each side separately,** then multiply the half sum and the three remainders together, and the square root of the last product... | |
| Thomas Keith - 1839
...the sum of these four logarithms is the logarithmic sine of half the angle sought (422). RULE III. **From half the sum of the three sides subtract each side separately.** Then add together, mic sines of the difference between the half sum and each side containing the required... | |
| John Hind - 1840 - 224 sider
...Triangle. The area is equal to half the product of the base and the perpendicular altitude. (3) Triangle. **From half the sum of the three sides, subtract each side separately:** multiply together the half-sum and the three remainders, and the square root of the product will be... | |
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