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OpenStudy (anonymous):
cos(2x)-x^2e^5y+3y^2 partial with respect to x: i say it would be 2sin(2x)-2xe^5y but the answer -2sin(2x)-2xe^5y why is this?
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OpenStudy (anonymous):
answer is right , derivative of cos is minus sin, remember the negative!
OpenStudy (anonymous):
oh haha silly me, thank you!
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