cos8／5＝sin＿＿?怎么转换啊?
问题描述：
cos8／5＝sin＿＿?怎么转换啊?
答
COSx=SIN(-（π/2-X）)=-sinπ/2-x
答
cos x=sin(π/2-x)=sin(π/2+x)
cos8／5＝sin＿＿?怎么转换啊?
COSx=SIN(-（π/2-X）)=-sinπ/2-x
cos x=sin(π/2-x)=sin(π/2+x)