百度移动下拉词排名
sin(π^2)
sin(α/2)
sin(π/2+2kπ)
sin(30°-π/2)
sin(π/2+α) = cosα
sin^2×cos^2
sin(2α-π/2)
sin(3π/2+α)=-cosα
sin nπ/2
sin(-2)
搜狗移动下拉词排名
神马移动下拉词排名