1、常见反三角函数值： arcsin0=0；arcsin(1/2)=π/6；arcsin(√2/2)=π/4；arcsin(√3/2)=π/3；arcsin1=π/2；atccos1=0；arccos(√3/2)=π/6；arccos(√2/2)=π/4；arccos(1/2)=π/3；arccos0=π/2；arctan0=0；arctan(√3/3)=π/6；arctan(1)=π/4...