已知:sin(x+π/6)=1/4,求sin(x+7π/6)+cos^2 (5π/6-x)的值
已知sin(x+π/6)的 =1/4,求sin(7π/6 +x)+cos(5π/6 -x)的平方的值
已知sin(x+π/6)=1/4,求sin(7π/6+x)+cos(5π/6-x)平方的值
已知sin(x+π/6)=1/4,求sin(x+7π/6)+cos^2 (11π/6-x)的值
已知sin(x+π/6)=1/3,求sin(7π/6+x)+cos²(5π/6-x)的值
已知函数f(x)=[6cos(π+x)+5sin^(π-x)-4]/cos(2π-x),且f(m)=2,求f(-m)的值
已知sin(x+π/6)=1/4,求sin(7π/6+x)+cos(11π/6-x)的值
化简:1、sin(x-π/3)-cos(x+π/6)+√3cosx=?2、已知,sinα+sinβ=√2/2,求cosα
已知sin(x+π/6)=1/3,求sin(5π/6-x)+sin^2(π/3-x)
已知f(x)=-1/2+sin(π/6-2x)+cos(2x-π/3)+cos²x,(1)求f(x)的最小正周
已知sin(π/6-x)=5/13,求cos(2π/3+2x)的值
已知函数f(x)=cos(2x-π/3)+2sin(x-π/4)sin(x+π/4)=sin(2x-π/6) ,
已知sin(x+π/6)=1/4,则sin(7π+x)+sin^2(5π/6-x)的值