已知sin(45`-x)=3/5,0

已知sin(45`-x)=3/5,0 已知sin(π/3-x)=-1/5,且0 已知:sin(x-派/6)=3/5(0 已知-π/2＜x＜0,sin x+cos x=1/5求sin 2x+2 sin 已知函数f(x)=-1/2+sin(5/2x)/2sin(x/2)(0 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(X+ 派/6)=1/4求 Sin(5/6派 - X)+Sin^2 (派/3 -X) 求极限 （（sin(x^3+x^2-x)+sin x) /x x→0 已知lim sinx/x=1 已知sin x-cos x=1/5(0 已知sin x+cos x=-1/5(0 若SIN X*COS X =1/3,已知0 已知sin(x+y)=1/3,sin(x-y)=1/5,则tanx/tany 已知y=3sin(x+20)+5sin(x+80),求最大值? 已知y=3sin(x+20)+5sin(x+80)求最小值如题 已知.sin (x+兀/6)=1/4.求:sin(5/6兀)+sin的平方(兀/3-x) 已知sin(π/4--x)=5/13,0 已知sin(π/4-x)=5/13,且0