The derivative has probably unlimited applications in physics, biology, economics and generally in real life. But let's see how we can use it to solve simple problems like optimizing the usage of a metal sheet when we want to build…

## Equation of the tangent to the curve at a point

Calculus is one of those branches of math that I must say I love it. It help us to find solutions to problems where the other branches fail. The following is just an example where calculus allows us to find…