sin(π/12)cos(π/12)的值

（cosπ/12-sinπ/12)(cosπ/12+sinπ/12)的值为 sin(π/12)cos(π/12)的值 cosπ/12+(根号3)×sinπ/12的值 sinπ/12-根号3cosπ/12的值 sinπ/12-√3cosπ/12的值 sin(25π/12)cos(11π/6)-cos(25π/12)sin(11π/6)的值是 （sinπ/24)(cosπ/24)(cosπ/12) （sinπ/24)(cosπ/24)(cosπ/12) sinπ/12*cosπ/12=? 求值：sin(π/12)+cos(π/12) sin(π/12)-cos(π/12)= cos*π/12—sin*π/12 cosπ／12乘以sinπ／12 计算cosπ/12*sinπ/12 若方程12x²+πx-12x=0的两的根分别是α,β,则cosαcosβ-√3sinαcosβ-√cosαsinβ-sinαsinβ= 化简sin（25π/12）cos（11π/6）-cos（11π/12）sin（5π/6）的值是 求下列各式的值：（1）sinπ/8cosπ/8（2）cos^2 π/12-sin^2 π/12 (cos π/8+ sin π/8 ) (cos^3 π/8+sin^3 π/8 )的值.