Why is the derivative of sin(x), cos(x)?
Find out what they know what the questions means, ie if they know what sinx and cosx are and then how much they understand about what derivatives are.I would explain from the point they're at, define everything for them and give them an intuition into how to understand it, then give an intuition as to why the question is true and then but more formal and give the explanation of the exam board.
RA
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