已知sinx=13,sin(x+y)=1,则sin(2y+x)= ___ .
已知sinx=13,sin(x+y)=1,则sin(2y+x)= ___ .
证明sin(x+y)sin(x-y)=(sinx)^2-(siny)^2.
sin(x+y)-sinx=2cos(x+1/2y)sin(1/2y)的详细证明步骤.
证明sin(x+y)sin(x-y)=sinx-siny
证明sinx+siny+sinz-sin(x+y+z)=4sin((x+y)/2)sin((x+y)/2)sin((x+
已知函数y=sin^2X+sinX+cosX+2
已知函数y=-sin^2x+sinx(-π/2
已知函数y=sin²x+ sinx +cosx +2(x∈R),求函数y的值域
函数y=sin*2x+sinx-1的值域
已知x,y,z属于(0,派/2),sin^2x+sin^2y+sin^2z=1,求(sinx+siny+sinz)/(c
已知sin(x+2y)=3sinx,求tan(x+y)*coty
已知函数Y=sin平方x+2sinx乘以cosx+3con平方x(x属于R)