sin 11π/6

sin 11π/6 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（x+11π/6）=sin（x-π/6）怎么得到的 sin^2(π/3-x)+sin^2(π/6+x) Sin(π+π/6)Sin(2π+π/6)Sin(3π+π/6).Sin(2008π+π/6)求值 sin 11π/4 求值 sin(-7π／6)求值 2sin π/6 =sin π/3,吗,求解释,还有-sin π/6=sin- π/6吗 求 SIN负6分之11πSIN负6分之11π 和SIN 负6分之17π的值 已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin^2（11π/6-x）如题, [Sin(6π+a)Cos(7π-a)]/[Sin(3π+a)+Sin(-π+a) 化简sin^2(α-π/6)+sin^2(α+π/6)-sin^2α sin^2(a-π/6)+sin^2(a+π/6)-sin^2a 求值sin^2(α-π/6)+sin^2(α+π/6)-sin^2α sin (973/2π) ,sin (374/2) sin(374/6)求三角函数值, sin(-11/6π)+cos12/5π×tan4π化简 sin(25π/12)cos(11π/6)-cos(25π/12)sin(11π/6)的值是 已知sin(x+π/6)sin(x-π/6)=11/20,则tanx的值为?