sin25π/6等于?

sin25π/6等于? sin25/6π+cos4/3π等于多少? sin25π/6+cos25π/3+tan25π/4等于多少? sin25π/6+cos25π/3+tan(-25π/4) 计算sin25/6π+tan9/4π-cos19/3π 计算sin25/6π+tan9/4π-cos19/3π sin25π/3 结果是多少. sin70°(sin25+cos25°)等于什么 sin25度45分等于多少?急需! 计算：sin25π/6+cos25π/4+tan(-25π/4)+sin(-26π/3) sin25π/6 + cos25π/3 + tan(-25π/4)这题怎么算? 求sin25π/6+cos25π/3+tan（-25π/4）的值? 计算,sin25π/6+cos25π/3+tan(-25π/4) 一道很基础的三角函数化简题sin25π/6+cos25π/3+tan25π/4 化简： cos70°cos25°－sin20°sin25°等于 sin70度cos25度-sin20度sin25度等于多少? cos70°cos25°+sin70°sin25°等于 sin70度sin65度－sin20度sin25度等于?