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OpenStudy (anonymous):
suppose z=f(x,y) is express in polar form z=(r, @) by making x=rcos@ and y=rsin@ use implicit differntiation to show that partial dr/dx=cos @
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hartnn (hartnn):
x=rcos@ diff. w.r t r, what u get for dx/dr = ?
OpenStudy (anonymous):
so dx/dr=cos @?
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