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不用三角函数表求解三角形的一个近似公式１１６０２２辽宁师范大学贺贤孝我们知道．已知三边长求直角三角形两个锐角时，需查反三角函数表．下查表行吗？本世纪４０年代，美国密执安州立学院的弗雷姆（Ｊ．Ｓ．Ｆｒａｍｅ）给出了用三边长直接求锐角的简捷公式：设直角△...
An approximate formula for solving triangles without the trigonometric function table 116022 He Xianxiao, Liaoning Normal University We know. It is known that when the three sides are long and two acute angles are required for a right-angled triangle, the inverse trigonometric function table must be checked. Check the table? In the 40s of this century, J.S.Frame of Michigan State University in the United States gave a simple formula for directly calculating the acute angle with three sides: set the right angle △...