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Handout Derivative Rules

Rules for specific types of functions.

Constant functions
\(\displaystyle (k)' = 0\)
Power functions
\(\displaystyle (x^{n})' = nx^{n-1}\)
Exponential functions
\((a^{x})' = a^{x}\ln(a)\)
\((e^{x})' = e^{x}\)
Logarithmic functions
\(\displaystyle (\ln(x))' = \frac{1}{x}\)
Trigonometric functions
\((\sin(x))' = \cos(x)\text{.}\)
\((\cos(x))' = -\sin(x)\text{.}\)
\((\tan(x))' = \sec^{2}(x) = \frac{1}{\cos^{2}(x)}\text{.}\)
\((\arcsin(x))' = \frac{1}{\sqrt{1-x^{2}}}\text{.}\)
\((\arctan(x))' = \frac{1}{1+x^{2}}\text{.}\)

Rules for combinations of functions.

Constant multiples
\(\displaystyle (k\cdot f(x))' = k\cdot f'(x)\)
Sum and difference
\(\displaystyle (f(x) \pm g(x))' = f'(x) \pm g'(x)\)
Products (the product rule)
\(\displaystyle (f(x)\cdot g(x))' = f'(x)g(x) + f(x)g'(x)\)
Quotients (the quotient rule)
\(\displaystyle \left(\frac{f(x)}{g(x)}\right)' = \frac{f'(x)g(x) - f(x)g'(x)}{(g(x))^{2}}\)
Compositions (the chain rule)
\(\displaystyle (f(g(x)))' = f'(g(x))\cdot g'(x)\)