求最值 y=-2sin(3x+π/4) (0≤x≤π/2)

y=2sin三分之一x y=4sin(x-π/3) y=sin(2x+π/6) y=3sin(1/2x-π/4) 的周期各是多少, 求最值 y=-2sin(3x+π/4) (0≤x≤π/2) 判断单调性 y=sin(x-π/6) y=sin(-2x+π/3) y=x^3sin^2x是奇函数还是偶函数还有y=x^cosx、y=5sin（3x-π/4） 求下列函数周期 y=3sin(x/4) x属于Ry=2sin(2x-π/6) y=2cos(x/4+ π/3)-3sin(x- π/4)y=sin(4x- π/3)-cos(3x+π/2) 函数y=4sin(x+π/6)+3sin(π/3-x)的最大值是多少 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 3sin^2x+-2sin^2y=2sinx sin^2x+-sin^2y=? 已知sinx=3/5,x∈(π/2,π),求【sin(x+y)+sin(x-y)】/【cos（x+y）+cos（x-y）】的值 y=sin(x+π/3)周期 证明sinx+siny+sinz-sin(x+y+z)=4sin((x+y)/2)sin((x+y)/2)sin((x+y)/2) 将y=sinX变换到y=2sin(3x+π/4)-2 将y=sinX变换到y=2sin(3X+π/4)-2