若sin(π/6-α)=根号3/3,则,sin(7π/6-α)=

若sin(π/6-α)=根号3/3,则,sin(7π/6-α)= 若sin(π/6-a)=根号3/3,则sin(7π/6-a)= 若sin(3π-α)=根号2sin(2π+β)已知sin(3π-α)=根号2 sin(π-β),根号3 cos(-α)= - 根号2 cos(π+β) 且0 求证:(根号3)*sinα+cosα=2sin(α+π/6) 已知sin(π/6-a)=根号3/3,则sin(5π/6+a)= 已知cos(α-π/6)+sinα=(4倍根号3)/5,则sin(α+7π/6)= 若sin(3π-α)=(根号2)sin(2π+β),(根号3)cos(-α)=(-根号2)cos(π+β),且0＜α＜π,0＜β＜π,求sinα,sinβ的值 已知向量a=(sin(α+π/6),1),b=(4,4cosα-根号3),若a⊥b,则sin(α+4π/3)等于 若sin(3π-2)=根号2sin(2π+β),根号3cos(-α)=-根号2cos(π+β)0 sinα=根号3,α=? -sinα+根号3cosα= 设角a=-35π/6,则2sin(π+α)cos(π-α)-cos(π+α)/ 1+sin^2α+sin(π-α)-cos^2(π+α)sina=sin(-35π/6)=sin(-6π+π/6)=1/2 cosα=根号3/22sin(π＋α)cos(π-α)-cos(π+α)/ [1+sin^2α+sin(π-α)-cos^2(π+α)]=2（-sinα)(-cosα）+cosα/[1+sin² tanα=根号3/3,则sinα等于 cosπ/6+根号3sinπ/6=? 已知α∈(π/2,π),sin(-α-π)=根号5/5,则sin(α-3/2π)= 已知sin(π-α)+sin(5π/2+α)=根号2/3(π/2 若sinα=m,求值：sin（3π-α）计算根号1-cos平方1200度 sin(α+4/π)+sin(α-4/π)=3/根号下2