hi everyone,
Find$\displaystyle \frac{dz}{dx} and \frac{dz}{dy}$
xyz-cos(x+y+z)=0
i am having problems with the cos(x + y + z).
Thank you in advance for all your help & support.
Sorry I will reply to this. Since General is offline.
Your $\displaystyle F_x$ is correct.
In general, If $\displaystyle h$ is differentiable, then:
$\displaystyle \frac{\partial}{\partial x}( \,\ cos( \, h(x,y,z) \, ) \,\ ) = -sin( \, h(x,y,z) \, ) \, \frac{\partial}{\partial x}( \, h(x,y,z) \, )$.
Did you get it ?