(sina)^2+(cos(π/6))^2+sinacos(π/6) 化简为?
问题描述:
(sina)^2+(cos(π/6))^2+sinacos(π/6) 化简为?
答
(sina)^2+(cos(π/6))^2+sinacos(π/6)=(sina)^2+(cos(π/6))^2+2sinacos(π/6)-sinacos(π/6)=(sina++cos(π/6))^2-sinacos(π/6)
=(sina+Г3/2)^2-(Г3/2sina)