已知sin(a+π/4)+sin(a-π/4)=√2/3则sin(a-π/4)/1-cos2a-sin2a的值
问题描述:
已知sin(a+π/4)+sin(a-π/4)=√2/3则sin(a-π/4)/1-cos2a-sin2a的值
答
已知sin(a+π/4)+sin(a-π/4)=√2/3则sin(a-π/4)/1-cos2a-sin2a的值