sin5/12π×cos5/12π怎么算?
sin5/12π×cos5/12π怎么算?
(sin5π/12+cos5π/12)(sinπ/12-cosπ/12)
(sin5π/12-sinπ/12)(cos5π/12+cosπ/12)=?
sin5/12π*cosπ/12 怎么算
(sin5π12−sinπ12)(sin5π12+sinπ12)
cos5π/12=sinπ/12
cos5分之πcos10分3π-sin5分之πsin10分之3π度等于多少
已知角α终边上一点的坐标是(sin5分之π,cos5分之π)、则角α的值是?
数学极限的运算lim α→π/2 (sinα-sin5α)/(cosα+cos5α)
不查表求值:cos5π/12·sinπ/12=
为什么cos5π/12等于sinπ/12
已知角a的终边上一点的坐标为(sin5π/6,cos5π/6),则角a的最小正值为___,答案为5π/3,