(cot30°-√3)(cos5°+sin5°)(cos5°-sin5°)
一个单摆摆长为2.0m,摆球质量为0.10kg,振动时最大偏角为5°,已知sin5°=0.087,cos5°
(cos5θ+i*sin5θ)^2/((cos3θ-i*sin3θ)^3)化成复数三角形式
sin5/12π×cos5/12π怎么算?
cos5分之πcos10分3π-sin5分之πsin10分之3π度等于多少
求值:[2sin50°+sin80°(1+√3tan10°)]/√2cos5°
化简【2sin50°+sin80°(1+√3tan10°)】/cos5°
cos65°-sin80°sin15°/cos5°-co..
(sin5π/12+cos5π/12)(sinπ/12-cosπ/12)
(sin5π/12-sinπ/12)(cos5π/12+cosπ/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,
已知角a的终边上一点的坐标为(sin5π/6,cos5π/6),则角a的最小值为----?答案是5π/3
数学极限的运算lim α→π/2 (sinα-sin5α)/(cosα+cos5α)