己知sin(x+派)=-1/2计算sin(5派-x)-cos(x-3派/2)(2)sin(派/2+x)*tan(派/2+
化简sin(派-x)+sin(派+x)-cos(-x)+cos(2派-x)-tan(派+x)cot(派-x)
化简:sin(2派-x)tan(派+x)cot(-x-派)/tan(3派-x)cos(派-x)
f(x)=sin(派-x)cos(2派-x)/sin(派/2+x)tan(派+a) 求f(31派/3)
.若f(x)={sin(n派-x)cos(n派+x)/cos[(n+1)派-x]}*tan(x-n派)cot[(n派/2
已知sinx=3/5,求sin(x-3/2派cos(派-x)tan(派+x)
sin(x+派/3)+2sin(x-派/3)-根号3cos(2派/3-x)
sin(x+派/3)sin(x+11派/6)=1/2定义域是 :负派 到 派/2
求(sin(派-x)cos(3/2派-x)tanx)/(cos(2派-x)cot(x-派/2)sin(派/2-x))
已知sinx=-5/13,x属于(派,3派/2),求sin(x-派/4)
f(x)=cos(2x-派/3)-2sin x*cos (派/2+x)
sin(x/2+派/6)=1/2,求cos(x+派/3)
求三角函数值域 y=sin(2x-派/3),x属于[派/6,派/2]