sin(45度+30度）怎么算
问题描述：
sin(45度+30度）怎么算
答
依照：sin(x+y)=sin(x)cos(y)+sin(y)cos(x)
sin（45°+30°）= sin45°cos30°+ sin30°cos45°
=(√2/2)*(√3/2) + 1/2 * (√2/2)
=(√6+√2)/4