若sin(x+50°)+cos(x+20°)=-√3且x在0到360度中间,0可取,则x的大小.

问题描述:

若sin(x+50°)+cos(x+20°)=-√3且x在0到360度中间,0可取,则x的大小.

sin(x+50°),当X=220°时最小为-1,
cos(x+20°),当X=160°时最小为-1..
那么当X=160°时sin(x+50°)+cos(x+20°)=-1/2+(-1)