Trig derivatives, from limits to motion.
See why the special trig limits work, build the derivative rules, then practise every example with your own answers checked.
Trap a wild function between two tame ones
Trap a wild function between two tame ones
Match the tangent input
Type any function of x
Homework question not on this page? Type it in. You get the rule for each piece, outside in, one step at a time, then the tidy answer.
The tangent line touches the curve at the point; its steepness is f′(x). The measured slope zooms in on the curve, so it should match f′ once you finish the steps.
Need a hand with trig limits or derivatives?
Bring your practice questions. We work through them together until every type feels routine.
Questions, answered.
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