AibhlinnM409882
AibhlinnM409882
28-10-2022
Mathematics
contestada
If f(x) = 4x(sin x + cos x) , find
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ArjenK226699
ArjenK226699
28-10-2022
It was found that
[tex]f^{\prime}(x)=4xcos(x)-4xsin(x)+4sin(x)+4cos(x)[/tex]
Then, evaluating at x=4,
[tex]f^{\prime}(4)=4*4cos(4)-4*4sin(4)+4sin(4)+4cos(4)=20cos(4)-12sin(4)[/tex]
Therefore, the exact answer is 20cos(4)-12sin(4)
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