设△ABC中最小角为A,且cosA=a-1/a+1,则a的取值范围是.

Question

设△ABC中最小角为A,且cosA=a-1/a+1,则a的取值范围是_____.

Answer 1

0＜A≤60
0.5≤cosA＜1
0.5≤a-1/a+1＜1
a≥3