好像很简单的题目

来源: 于 2022-09-24 20:34:59 [旧帖] [给我悄悄话] 本文已被阅读：次

Let S be a square, let M and N be the midpoints of two adjacent sides, and let V be the corner of the square that is opposite both M and N. Let θ be the measure of the angle between the two lines connecting M and N with V. Compute sin(θ) 

要求不能用三角函数公式