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Differentiating Other Functions (Trig, ln & e etc) (Edexcel International A Level Maths: Pure 3)
Revision Note
Differentiating Other Functions (Trig, ln & e etc)
How do I differentiate common functions?
- These are the common results
- for
How do I differentiate exponentials and logarithms?
- The two basic differentiation formulae are:
- From those basic formulae are derived these two additional formulae:
- And for exponentials more generally:
- This last formula can be derived from Formula 3 by using the chain rule
Examiner Tip
- The formulae for some of these derivatives are not given in the formulae booklet – you need to know them.
- The formulae for ekx and ln x are the ones you absolutely do need to know .
- The other formulae can be derived from those two as shown above, and remember – the derivative of ln kx is , NOT !
Worked example
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