- #1
JasonJo
- 429
- 2
1) Rewrite the following expression in polar coordinates:
(second derivative of z with respect to x) + (second derivative of z with respect to y)
where x=rcos(theta)
y = rsin(theta)
i had first derivative of z with respect to x = (dz/dx)(dx/dr) + (dz/dx)(dx/d(theta))
same concept for y
and then i just took the derivative of my dz/dz and dz/dy variables again
2) describe this surface in cylindrical coordinates
z = rcos3(phi)
express in cartesian coordinates
i really do not get cartesian coordinates
can anyone show me the generic method?
3) x = psin(phi)cos(theta)
y = psin(phi)sin(theta)
z = pcos(phi)
near which points of R^3 can we solve for: p phi and theta in terms of x, y and z, describe the geometry behind your answer.
again, i am really really weak in coordinate systems.
any help is appreciated, thanks guys
(second derivative of z with respect to x) + (second derivative of z with respect to y)
where x=rcos(theta)
y = rsin(theta)
i had first derivative of z with respect to x = (dz/dx)(dx/dr) + (dz/dx)(dx/d(theta))
same concept for y
and then i just took the derivative of my dz/dz and dz/dy variables again
2) describe this surface in cylindrical coordinates
z = rcos3(phi)
express in cartesian coordinates
i really do not get cartesian coordinates
can anyone show me the generic method?
3) x = psin(phi)cos(theta)
y = psin(phi)sin(theta)
z = pcos(phi)
near which points of R^3 can we solve for: p phi and theta in terms of x, y and z, describe the geometry behind your answer.
again, i am really really weak in coordinate systems.
any help is appreciated, thanks guys