2sin π/6 =sin π/3,吗,求解释,还有-sin π/6=sin- π/6吗

2sin π/6 =sin π/3,吗,求解释,还有-sin π/6=sin- π/6吗 化简sin(α+β)+sin(α-β)+2sinαsin(3π/2-β)= sin^2(π/3-x)+sin^2(π/6+x) 2sin(α+π/3）=sinα+______ Sin(π+π/6)Sin(2π+π/6)Sin(3π+π/6).Sin(2008π+π/6)求值 [sin(a-6π)cos(7π/2-a)]/[sin(3π+a)+sin(a-π）】= 已知sin(x+π/6)=1/3,求sin(5π/6-x)+sin^2(π/3-x) 已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin^2(π/3-x) 已知sin(3π-α)=-2sin(π/2+α)则sinαcosα sin0=0 sin(1/6π)=1/2sin(1/3π)=√3/2sin(1/2π)=1sin(2/3π)=√3/2sin(5/6π)=1/2sin(π)=0sin(-π)=0sin(-5/6π)=-1/2sin(-2/3π)=-√3/2sin(-1/2π)=-1sin(-1/3π)=-√3/2sin(-1/6π)=-1/2sin(7/6π)=-1/2sin(4/3π)=-√3/2sin(5/3π)=-√3/2sin(11/6π)=-1/ sin（-19π/6）=?已知[3Sin(π+a)+Cos(π-a)]/4Sin(-a)-Sin(5π/2+a)=2，求tan a 计算,sin(π/12)-sin(5π/12)+2sin(π/8)sin(3π/8) 若α∈(π/2,π),sin(α+π/6)=3/5,sinα= 若函数sin(π/3+a)=2/3,则sin(π/6+2a)= 如果sin(α-π/6)=1/3,那么sin(2α+π/6)= 已知sin(π/6+a)=（根号3）/3,求sin(2π/3+a)? sin(a-π/6)=3/5,求sin(2a+π/6) 判断单调性 y=sin(x-π/6) y=sin(-2x+π/3)