解sinx=2sin(pai/3-x)

解sinx=2sin(pai/3-x) cos(x-pai/4)=根号2/10,x属于(pai/2,3pai/4)求sinx和sin(2x+pai/3) f(x)=(sinx)平方+2根号3sin(x+pai/4)cos(x-pai/4)-(cosx)平方-根号3 化简!f(x)=sin(pai-x)cos(3/2pai+x)+sin(pai+x)sin(3/2pai-x) sin（pai／3-x）等于sinx? 已知cos(x-pai/4)=根号2/10,x€(pai/2,3pai/4).(1)求sinx的值(2)求sin(2x+ cosx -（根号3）*sinx这道题的答案是-2sin(x +pai /3)还是2sin(x +pai /3) Y=2COSX·sin（X+pai/3）-根号3sin平方X+sinX·cosX 已知sin(x-pai/4)=根号2/10,X属于(pai,5pai/4) 求sinx得值.求cos(2x-pai/6) 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 已知向量a=(sin(x+ pai/6),2sin pai/2),b=(1,sinx/2),x属于[0.pai],定义函 已知cos(x-pai/6)+sinx=4乘根号3/5,则sin(x+7pai)=