从一道题看异面直线所成角大小的求法杨钊题目在直二面角α-l-β的两个半平面内各有一点A,B,线段AB和两个半平面所成的角都是30°,求线段AB与该二面角的棱l所成角的大小.解法一(定义法)定义法的关键是作出两异面直线所成的角,然后通过解三角形求角. From a problem to see the angle of a straight line by the formation of different sizes Yangzhao title in the two straight half-angle α-l-β in the two half-planes have a little A, B, AB and two half-line angle Is 30 °, find the line segment AB and the dihedral angle l of the angle of the size of Solution A (Definition) The key to the definition of the law is to make two different sides of the angle formed by the line, and then by solving the triangular angle.