It will help to know if the geometric proof of the derivative of cos x okay or not.
DigitalSplendid New member Joined Nov 14, 2021 Messages 25 Mar 4, 2025 #1 It will help to know if the geometric proof of the derivative of cos x okay or not.
blamocur Elite Member Joined Oct 30, 2021 Messages 3,194 Mar 4, 2025 #2 I wouldn't call it a proof, but it is a nice illustration. It implicitly relies on the fact that in a unit circle DB≈ΔaDB \approx \Delta aDB≈Δa.
I wouldn't call it a proof, but it is a nice illustration. It implicitly relies on the fact that in a unit circle DB≈ΔaDB \approx \Delta aDB≈Δa.
