sin29π/6+cos(-29π/3)+tan(-25/4)

题目

sin29π/6+cos(-29π/3)+tan(-25/4)

答案

sin29π/6+cos(-29π/3)+tan(-25π/4) =sin(24π/6+5π/6)+cos(-30π/3+π/3)+tan(-24π/4-π/4) =sin5π/6+cosπ/3-tanπ/4