y=sin(π+x),x∈[-π/2,π] 的单调增区间是 ∵x∈[-π/2,π]∴π+x∈[π/2,2π]

已知sinx=3/5,x∈(π/2,π),求【sin(x+y)+sin(x-y)】/【cos（x+y）+cos（x-y）】的值 判断单调性 y=sin(x-π/6) y=sin(-2x+π/3) 设函数 f(x)=sin(2x+y),(-π y=sin(x+π/6)+sin(x-π/6)+cosx ,x∈[-π/2,π/2]的值域 已知x+y+z=π,证明sin(x+y)+sin(y+z)+sin(z+x)≥sin2x+sin2y+sin2z y=sin(x+π/3)周期 y=|sinπx|的周期 y=sin(π/2+πx)sinπx的最小正周期为 y=sin(π/2+πx)sinπx最小正周期 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 y=sin(x+π/3)sin(x+π/2)化简 函数y=2sin(π/3-X)+sin(π/6+X)的最大值 周期y=sin(x+π/3)sin(x+π/2) 的最小正周期是多少 1.y=x*e^(2x) 2.y=(sin(2x))/x 3.y=sin(3x+(π/3))怎么求导数! 解微分方程：x(y´+1)+sin(x+y)=0, y(π/2)=0 函数y=sin(π/2-x),x∈[-π,π/2]的单调性是 y=sin(2x-π/3) x∈(π/2,π)求值域