已知Sin(45-x)=3/5,求Sin2x如上求高人解答.

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) 已知.sin (x+兀/6)=1/4.求:sin(5/6兀)+sin的平方(兀/3-x) 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)+3cos(x)=2,求sin(x)-cos(x)/sin(x)+cos(x)=? 已知-π/2＜x＜0,sin x+cos x=1/5求sin 2x+2 sin 已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x 已知3SIN^2A+2SIN^2B=5SINA,求SIN^2A+SIN^2B范围 已知Sin(45-x)=3/5,求Sin2x如上求高人解答. 已知sin(x+π/6)=-3/5,求sin²(π/3-x)-sin(5π/6-x)的值是31/25 已知sin(x+6/π)=4/1,求sin(6/5π-x)+sin^2(3/π-x)的值 已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin方(π/3-x)的值 已知sin(x+pi/6)=1/4,求sin（5pi/6-x)+sin^2(pi/3-x)的值 已知Sin(2x+pi/3)=1/3,求Sin(5Pi/6-4x),用三角变换 已知sin(X+Y)=2/3,sin(X-Y)=1/5,求(tanX)/(tanY)的值 已知y=3sin(x+20°)+5sin(x+80°）,求该函数最大值