求函数z=sinx+siny+sin(x+y)(0
求函数z=sinx+siny+sin(x+y)(0
已知x,y,z属于(0,派/2),sin^2x+sin^2y+sin^2z=1,求(sinx+siny+sinz)/(c
求sin(x+y)=sinx+siny的导数
证明sinx+siny+sinz-sin(x+y+z)=4sin((x+y)/2)sin((x+y)/2)sin((x+
证明sin(x+y)sin(x-y)=sinx-siny
三角不等式证明证明sin(x+y)+sin(y+z)+sin(z+x)>sinx+siny+sinz+sin(x+y+z
求下列导数:sin(x+y)=sinx+siny e^x+x=e^y+y
已知sinx+siny+sinz=cosx+cosy+cosz=0,求tan(x+y+z)+tanxtanytanz的值
sinx+siny=-1/3 cosx+cosy=1/2,求sin(x+y)的值.
arcsin(sinx+siny)+arc(sinx-siny)=kπ/2,K为奇数,求sin^2x+sin^2y的值
将sinx+siny+sinz-sin(x+y+z)化为积的形式
证明 [sin(2x+y)/sinx]-2cos(x+y)=siny/sinx