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Mathematics 19 Online
OpenStudy (anonymous):

integrate sqrt(16-y^2)/2 dy

OpenStudy (kc_kennylau):

I would let \(y\) be \(\cos\theta\).

OpenStudy (anonymous):

how to know what to change??

OpenStudy (anonymous):

change to what*

OpenStudy (kc_kennylau):

sorry my careless mistake

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