已知sin(x+π/6)=1/4,求sin(7π/6+x)+cos(11π/6-x)的值
已知sin(x+π/6)=1/4,求sin(7π/6+x)+cos(11π/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(x+7π/6)+cos^2 (11π/6-x)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,求sin(7π/6+x)+cos(5π/6-x)平方的值
已知函数f(x)=sin(2x+π/6)+sin(2x+π/6)+2cos²x
已知f(x)=-1/2+sin(π/6-2x)+cos(2x-π/3)+cos平方x.
已知sin(x+π/6)=1/3,求sin(7π/6+x)+cos²(5π/6-x)的值
已知sin x/2 -- 2cos x/2=0.(1)求tan x的值.(2)求 cos2x/(√2cos(π/4+x)
已知sin(x+π/6)=1/4,.求sin(7π/6+x)+cos2(5π/6-x)的值
已知函数f(x)=sin(2x-π/6)+cos^2x.若f(a)=1求sinacosa的值
《1》求函数y=sin(·π/3+4x)+cos(4x-π/6)的单调区间《2》已知f(x)=4cosx乘sin(x+π