For ex, I’m trying to intuitively understand why the derivative of secx = secxtanx as opposed to just memorizing it.
When it comes to the derivatives of trig functions, are we still looking at the slope of the tangent line of f(x)? Not sure if this question makes sense. Thanks!
In: 1
Yes, the derivative is still the slope of the function. [Here’s](https://www.mathsisfun.com/calculus/derivatives-trig-proof.html) a link to showing proofs of the derivatives of sine and cosine, and once you know those you can apply other derivative rules to find the other trig functions.
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