Lamber's consine relatino

By using the cosine relation of angle between the skew and straight beam bridges, the approximate method for solution of surplus unknow forces of continuoud skew beam bridge is obtained.

應用斜梁橋與正梁橋之間夾角的余弦關系 ,找到了一種求解連續斜梁橋贅余未知力的近似方法。