求sin25π/6+cos5π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)-sin(-5π/6)×cos(-5π/3)的值

求sin25π/6+cos5π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)-sin(-5π/6)×cos(-5π/3)的值 sin25π/6等于? 计算cos5分之π+cos5分之2π+cos5分之3π+cos5分之4π 计算cos5分之π+cos5分之2π+cos5分之3π+cos5分之4π 计算不太明白...求值sin(-1320°）*cos1110°+cos（-1020°）sin750°+tan（-405°）求值sin25π/6+cos25π/3+tan25π/4+sin7π/3*cos13π/6-cos5π/3 sin25π/3 结果是多少. 求sin25π/6+cos25π/3+tan（-25π/4）的值? sin25π/6+cos25π/3+tan(-25π/4) 计算sin25/6π+tan9/4π-cos19/3π 计算sin25/6π+tan9/4π-cos19/3π sin25/6π+cos4/3π等于多少? 求cos5π/12sinπ/12 cos5分之π×cos5分之2π sin(-4/3π）+cos5/6π= sin5/3π= ,cos5/3π cos5π/3为什么等于1/2? COS5π/3=要步骤 cos5π等于=