Question

y = cos^2 x find dy by dx​

Answer 1

Given:-

y = cos²x

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dy/dx = d((cosx)^2)/dx

dy/dx =d((cosx)^2)/d(cosx)*d(cosx)/dx

dy/dx =2(cosx)*(-sinx)

dy/dx = -(sin2x)

Derivative of cos²x is -(sin2x)

Answer 2

Answer:

y=cos^2x

dy/dx =d/dx(cos^2x)

=2cosx(-sin x)

=-2sin x cos x

=- sin2x

Step-by-step explanation:

hope it helps you