sinπ/12-根号3乘以cosπ/12的值是多少

sinπ/12-根号3乘以cosπ/12的值是多少 cosπ／12乘以sinπ／12 求sin π/12-(根号3)cos π/12 cosπ/12+(根号3)×sinπ/12的值 根号3×cosπ／12－sinπ／12=? sinπ/12-根号3cosπ/12的值 根号3sinπ/12+cosπ/12 Sin(x+π/3)+2Sin(x-π/3)-根号3乘以Cos(2π/3 -x ) 化简化简 sin π/12 -根号3cos π/12的值为：-根号2?为什么. 1sin3分之4π乘以6分之cos25π乘以tan-4分之3π=2若tana等于-3,则sin(π+a)乘以cos(π+a)=3化简：sin250°+cos790°分之根号下的1+2cos290°乘以cos790°=4根号下的1+sin（π-2)乘以cos（π+2)= 化简f(x)=sin(x/2+π/12)乘以cos(x/2+π/12)-cosx/2乘以cosx/2 根号3 sinπ/12+cosπ/12的值是多少 sin（π／12）-根号3倍cos（π／12)的值 sin(3π-a)=根号2乘以cos(3π/2+B),    根号3乘以cos(-a)= - 根号2乘以cos(π+B)   ,0＜a＜π,0＜B＜π,求a和B 根号[1-2sin(3-π)cos(3-π)]化简 根号3sin(π/6-a)-cos(π/6-a) cosπ/6+根号3sinπ/6=? sin派/12-根号3 cos派/12的值