cos(派/4+x)=3/5,17派/12
cos(派/4+x)=3/5,17派/12
若cos(派/4+x)=3/5,17派/12
已知cos(x-派/4)=3/5,x(派/2,3派/4)
已知sin(派/4)+x=-1/5,求cos(3/4派)+x的值
已知sina=1/5 a属于(派/4,派)则cos(a-派/3)=
已知sinx=3/5,求sin(x-3/2派cos(派-x)tan(派+x)
已知cos(x-派/4)=根号2/10,x属于(派/2,3派/4)求sinx的值
已知Cos(x-派/4)=根号2/10,x属于(派/2,3派/4)求sinx的值.
cos(x-三分之派)=3/4,则sin(六分之派+x)
已知COS(X+派/4)=根号2/10,x属于(派/2,3派/4) 求sinx 求sin(2x+派\4)
已知sinx=-5/13,x属于(派,3派/2),求sin(x-派/4)
cos(3/2派+x)=?