sin(π/12)cos(π/12)的值

cosπ/12+(根号3)×sinπ/12的值 sinπ/24*cosπ/24*sinπ/12=—— 答案是这么写的:1/2(2sinπ/24*cosπ/24)cosπ cos*π/12—sin*π/12 计算cosπ/12*sinπ/12 求值：sin(π/12)+cos(π/12) 化简sin（25π/12）cos（11π/6）-cos（11π/12）sin（5π/6）的值是 (cos π/8+ sin π/8 ) (cos^3 π/8+sin^3 π/8 )的值. （cosπ/12-sinπ/12)*(COSπ/12+sinπ/12)等于 已知sin(α+π/12)＝1/3,求cos(α+7π/12)的值 根号3 sinπ/12+cosπ/12的值是多少 sin（π／12）-根号3倍cos（π／12)的值 若x=π/12,则cos²x-sin²x的值等于