i am having problem getting the dθ in the laws of area.(adsbygoogle = window.adsbygoogle || []).push({});

what the textbook states is,

dθ=

xdy-ydx

x^{2}+y^{2}

I cant get the equation..

the only thing i could think of is trigo functions, but i got stuck...

any help?

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# Laws of area and conservation of momentum

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