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what is differntial of cosx\cos x

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Q. what is differntial of cosx\cos x
  1. Identify function: Identify the function to differentiate. f(x)=cosxf(x) = \cos x
  2. Recall rule: Recall the derivative rule for cosine.\newlineThe derivative of cosx\cos x is sinx-\sin x.
  3. Differentiate function: Differentiate the function. f(x)=sinxf'(x) = -\sin x