We like mechanical calculators like slide rules, but we have to admit that we had not heard of the Ott Derivimeter that [Chris Staecker] shows us in a recent video. As the name implies, the ...

👉 Learn how to find the derivative of a function using the chain rule. The derivative of a function, y = f(x), is the ...

👉 Learn how to find the derivative of trigonometric functions. The derivative of a function, y = f(x), is the measure of the ...