Derivative of 2cos(7x)

Derivative of 2cos(7x). Simple step by step solution, to learn. Simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

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Derivative of 2cos(7x): 


(2*cos(7*x))'

(2)'*cos(7*x)+2*(cos(7*x))'

0*cos(7*x)+2*(cos(7*x))'

0*cos(7*x)+2*-sin(7*x)*(7*x)'

0*cos(7*x)+2*-sin(7*x)*((7)'*x+7*(x)')

0*cos(7*x)+2*-sin(7*x)*(0*x+7*(x)')

0*cos(7*x)+2*-sin(7*x)*(0*x+7*1)

0*cos(7*x)+2*7*(-sin(7*x))

0*cos(7*x)+2*-7*sin(7*x)

-14*sin(7*x)

The calculation above is a derivative of the function f (x)

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