Thread: area element in polar coordinates

using only trigonometric identities, derive the differential area element in polar coordinates? any help with this problem or at least a start?
dont solve the problem for me, i would just like some clues, thanks
i know this much so far
dA=(dr)(rd θ)

Originally Posted by markapplegate

using only trigonometric identities, derive the differential area element in polar coordinates? any help with this problem or at least a start?
dont solve the problem for me, i would just like some clues, thanks
i know this much so far
dA=(dr)(rd θ)

Read this: Area and volume elements in polar coordinate systems

thanks for the information, im still not sure how to start this problem at all though? what would you start with?