sin(arcsin1/2+arccos1/3)?
问题描述:
sin(arcsin1/2+arccos1/3)?
答
sin(arcsin1/2+arccos1/3)=sin(arcsin1/2)cos(arccos1/3)+cos(arcsin1/2)sin(arccos1/3)=1/2*1/3+根号(1-(1/2)^2)*根号(1-(1/3)^2)=1/6+(根号3)/2*2根号(2)/3=1/6+(根号6)/3=(1+2根号6)/6...