SIN(5/2π-X)能化简成什么
-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sin(x+π/6)=1/3,求sin(5π/6-x)+sin^2(π/3-x)
已知sin(π/2-x)+sin(π-x)/cos(-x)+sin(2π-x)=2009,则tan(x+5π/4)等于?
s = 2*sin(x)-sin(2*x)+2/3*sin(3*x)-1/2*sin(4*x)+2/5*sin(5*x)
已知sin(x+π/6)=1/4,则sin(7π+x)+sin^2(5π/6-x)的值
化简sin(3π-x)cos(x-3/2)cos(4π-x)/tan(x-5π)cos(π/2+x)sin(x-5/2π
化简sin(2π+x)cos(π-x)sin(π-x)/cos(x-π)sin(-π-x)sin(π+x)
y=cosπx/2*sinπx/2是根据什么公式转化成y=(1/2)sin(2*πx/2)
3道求极限的题目1.sin 2x/sin 5x (x→0)2.(sin x - sin a)/(x - a) (x→a)
函数y=sin(2x+5π2)
函数y-sin(3x+5π/2)的对称轴