not-eddie-money
not-eddie-money
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Use the chain rule. d/dx(ln(x))=1/x d/dx(cos(x))=-sin(x) so f'(x) = 2*(1/cos(x))*(-sin(x)) f'(x)=-2*tan(x)
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Use the chain rule. d/dx(ln(x))=1/x d/dx(cos(x))=-sin(x) so f'(x) = 2*(1/cos(x))*(-sin(x)) f'(x)=-2*tan(x)