Pondera
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Implicit Differentiation with Sin
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jgens
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It looks like you're not applying the product rule properly when differentiating xy^2. d(xy^2) = y^2 + 2xyy'
Pondera
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I wasn't using the product rule at all. Thank you for that! Haha.
I tried it again and got:
Line by line:
7= cos(xy^2)(y^2+2xyy')
7/ cos(xy^2) = (y^2+2xyy')
7/ cos(xy^2) - y^2 = 2xyy'
(7/ cos(xy^2) - y^2)(2xy) = y'
I tried it again and got:
Line by line:
7= cos(xy^2)(y^2+2xyy')
7/ cos(xy^2) = (y^2+2xyy')
7/ cos(xy^2) - y^2 = 2xyy'
(7/ cos(xy^2) - y^2)(2xy) = y'
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On your last step, why are you multiplying by 2xy?...Shouldn't you be dividing instead?
Pondera
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Yeah, it should be divided by our multiplied by (1/2xy). I'm not sure why I did that. :P
The rest of it looks okay though?
The rest of it looks okay though?
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the rest looks fine 
Pondera
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WOOO! It was right! Thank you very much, jgens and gabba.