SIN(5/2π-X)能化简成什么

SIN(5/2π-X)能化简成什么 sin(π-2x)等于什么啊.sin(π-2x)sin(π+2x)sin(-2x)都等于什么啊. sin(x+π/4)sin(x-π/4)等于什么? -sin(3x/2)*sin(x/2)等于什么为什么 sin^2 x (sin平方x) 这个等于什么? 已知-π/2＜x＜0,sin x+cos x=1/5求sin 2x+2 sin 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) sin(x+5π/2)=? sin(2x+90°)等于什么 sin²2x求导等于什么? 急,matlab解非线性方程组用什么函数呢 方程如下所示：(cos(x(1))*cos(x(3))-sin(x(1))*cos(x(2))*sin(x(3)))*(194-x(4))*x(7)+(cos(x(1))*sin(x(3))+sin(x(1))*cos(x(2))*cos(x(3)))*(145-x(5))*x(7)+sin(x(1))*sin(x(2))*x(6)*x(7)-1=0;(-sin(x(1 y=12sin(2x+π/6)+5sin(π/3-2x)最大值 y=12sin(2x+π/6)+5sin(π/3-2x)的最大值 sin^2(π/3-x)+sin^2(π/6+x) 2sin(x+π/4)sin(x-π/4)=? 求不定积分【sin(x)^5 + sin(x)^3】^(1/2) sin^2(π/4 +x)