Question

find dy/dx if y=2x+2cos4

Answer 1

$y = 2x + 2 \cos(4) \\ (dy \div dx) = 2 + 0$
here is your answer
if question is
$y = 2x + 2 \cos(x) \\ (dy \div dx) = 2 - 2 \sin(x)$
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