sin(pai/3-x)等于sinx?
sin(pai/3-x)等于sinx?
cosx -(根号3)*sinx这道题的答案是-2sin(x +pai /3)还是2sin(x +pai /3)
解sinx=2sin(pai/3-x)
Y=2COSX·sin(X+pai/3)-根号3sin平方X+sinX·cosX
f(x)=sin(x+pai/6)+cos(x+pai/3)+sinx+a(a属于R+且a为常熟),并且函数f(x)的最
cos(x-pai/4)=根号2/10,x属于(pai/2,3pai/4)求sinx和sin(2x+pai/3)
sin(x-2pai)-cos(pai-x)=(1-根号3)/2,x是第二象限的角.求:(1)sinx与cosx的值(2
f(x)=(sinx)平方+2根号3sin(x+pai/4)cos(x-pai/4)-(cosx)平方-根号3
已知cos(x-pai/6)+sinx=4乘根号3/5,则sin(x+7pai)=
已知cos(x-pai/4)=根号2/10,x€(pai/2,3pai/4).(1)求sinx的值(2)求sin(2x+
已知函数y=f(x)=(sinx)平方-根号3sin(pai+x)*cosx
化简!f(x)=sin(pai-x)cos(3/2pai+x)+sin(pai+x)sin(3/2pai-x)