sin(x－45°)＝-5/13,sin2x

sin(x－45°)＝-5/13,sin2x 解方程：2sin²（x／2)＋5sin(x／2)－3＝0 设sin（45-x）=5/13,0 Sin(15°+x)－sin(15°-x) 求大神!Sin(15°+x)－sin(15°-x)求大神! sin(30+x)=5/13,60 sin x 已知sin(45度＋α)＝5/13 sin(135度-α)＝ f(x)=3sin(x-20°)+5sin(x+40°)的最大值 已知sin(45度－X)＝5分之3,则sin2X的值为多少 cos(27°+x)sin(57°+x)-sin(207°+x)sin(327°+x) 函数y=3sin(x+30°)+5sin(x+90°)的最大值为 sin(sin(x))的奇偶性 sin(30°+x)-sin(30°-x)等于多少? 求不定积分【sin(x)^5 + sin(x)^3】^(1/2) 求∫√(sin^3x-sin^5x)dx S (sin 5x) (sin 3x) dx = ∫sin(5x)sin(7x)dx= sin(sin x)泰勒展开到含x^5项