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f(x) = tan 2x , f'(x) = ....



Sagot :

using the chain rule : [tex][\tan(2x)]'=(2x)'\tan'(2x)=\frac{2}{\cos^2(2x)}[/tex]
[tex]f(x)=\tan 2x\\ f'(x)=\sec^2 2x\cdot2=2\sec^2 2x[/tex]