已知sin^2a sin^2b sin^2c=1求cosacosbcosc等于多少

小编 2025-01-09 17:50:29 娱乐 520阅读

已知sin^2a+sin^2b+sin^2c=1求cosa*cosb*cosc等于多少

已知sin^2a sin^2b sin^2c=1求cosa*cosb*cosc等于多少