qnoah67
qnoah67 qnoah67
  • 13-06-2022
  • Mathematics
contestada

what is the second derivatives for Cos²x
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loneguy
loneguy loneguy
  • 13-06-2022

[tex]f(x) = \cos^2 x \\\\f'(x) = 2 \cos x ( - \sin x) = - 2 \cos x \sin x = -\sin 2x\\\\f''(x) = -2\cos 2x\\\\\text{The second derivative of}~ \cos^2 x ~ \text{is}~ -2 \cos 2 x[/tex]

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