Partial derivatives x=rsinecoso r=vx2+y2+22 y=r sinesing z=rcos0 c0S0= Vx2+y2+22 tgo=y/x +y2+22)i2x==sin0c0s0 ∂0 -sin0 Ox a0cosθcosp 8x Partial derivatives 2 2 2 r  x  y  z 2 2 2 cos x y z z     tg  y / x x = r sin cos y = r sin sin z = r cos ( ) 2 sin cos 21 21 2 2 2        rx x y z x xr x r r zx z x y z x x      cos cos )( ) 2 21 sin ( 3 2 2 2 3/ 2             