Write the word or phrase that best completes each statement or answers the question.
Find the derivative of the function at the given value of x using a graphing utility. If necessary, round to four decimal
places.
-$$f ( x ) = 4 x \cos x ; x = \frac { \pi } { 2 }$$

Question

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The Answer of Write the word or phrase that best completes each statement or answers the question.
Find the derivative of the function at the given value of x using a graphing utility. If necessary, round to four decimal
places.
-$$f ( x ) = 4 x \cos x ; x = \frac { \pi } { 2 }$$

Write the Word or Phrase That Best Completes Each Statement f(x)=4xcos⁡x;x=π2f ( x ) = 4 x \cos x ; x = \frac { \pi } { 2 }f(x)=4xcosx;x=2π​

Write the Word or Phrase That Best Completes Each Statement $f ( x ) = 4 x \cos x ; x = \frac { \pi } { 2 }$