Asked by Jake
                For x≠0, the slope of the tangent to y=xcosx equals zero whenever:
(a) tanx=-x
(b) tanx=1/x
(c) sinx=x
(d) cosx=x
Please help. I have a final tomorrow and I am working diligently to understand every type of problem that may show up on my test. Thank you very much.
            
        (a) tanx=-x
(b) tanx=1/x
(c) sinx=x
(d) cosx=x
Please help. I have a final tomorrow and I am working diligently to understand every type of problem that may show up on my test. Thank you very much.
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