已知sin(π/4-α）=5/13,0＜α＜π/4,则cos2α的值

来源：学生作业帮助网编辑：六六作业网时间：2024/05/13 00:10:29

已知sin(π/4-α）=5/13,0＜α＜π/4,则cos2α的值已知sin(π/4-α）=5/13,0＜α＜π/4,则cos2α的值已知sin(π/4-α）=5/13,0＜α＜π/4,则cos2α

已知sin(π/4-α）=5/13,0＜α＜π/4,则cos2α的值
已知sin(π/4-α）=5/13,0＜α＜π/4,则cos2α的值

已知sin(π/4-α）=5/13,0＜α＜π/4,则cos2α的值
0