Evaluate lim(h→0): (cos²(x+h)-cos²x)/h | Limit and Continuity 

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Evaluate lim(h→0): (cos²(x+h)-cos²x)/h 

Keywords:Evaluate lim(h→0): (cos²(x+h)-cos²x)/h ,Limit and continuity class 11,NEB Class 11,Limit Evaluate lim(h→0): (cos²(x+h)-cos²x)/h ,

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