Question

differentiate by chain rule :- cos [ 3x - x² ] ??​

Answer 1

Answer:

The formula of cos(3x) is 4 cos^3(x) -3 cos(x). Let us discuss how this formula is derived. => cos(3x) = (2cos^2(x)-1)cos(x)-sin(x)2sin(x)cos(x).

Explanation:

follow me

Answer 2

Answer:

formula used :- y = sin u

here , 'I'm is the function of 'X' .

dy/dx = d/dx( sin u )

dy/dx = cos u ( du/dx )

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Question:- to differentiate , cos [ 3x - x² ]

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Answer :-

☆ y = cos [ 3x - x² ]

==> dy/dx = - sin ( 3x - x² ) d/dx ( 3x - x² )

==> - sin ( 3x - x² ) ( 3 - 2x )