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OpenStudy (anonymous):
If x cos y = 1 + tan(xy), find dy/dx?
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hartnn (hartnn):
do you know product and chain rule in differentiation ?
OpenStudy (anonymous):
Yes
hartnn (hartnn):
then at which step are you stuck ? can you show me what have u tried ?
OpenStudy (anonymous):
-x sin yy' + cos y = sec^2 (xy) (xy' + y)
hartnn (hartnn):
that's correct, what next?
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OpenStudy (anonymous):
I got it.
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