Asked by Dani
Show that the function f(x) e^xcosx has exactly one turning point when x is between 0 and 90 degrees. Determine the nature of the stationary point . f(x) = e^xcosx, x E Real number
Answers
Answered by
oobleck
f = e^x cosx
f' = e^x (cosx - sinx)
So, when is cosx = sinx?
f' = e^x (cosx - sinx)
So, when is cosx = sinx?
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