Yes if it was not practical it was not there. You can see the real life use on this link http://www.intmath.com/Applications-differentiation/Applications-of-differentiation-intro.php
none
Finding the area under a curve or the length of a line segment. These are real life uses, not just fun in your math class.
vice grips
Pretty much any serious statistical model or experiment on anything will use basic calculus to interpret data. Anything that exponentially grows or decays (radioactive matter, bacteria, population growth, etc.) Anything that's built to be structurally sound. Anything that uses the EM spectra (radio, microwaves, visible light, etc.) All scientific industries use calculus practically constantly. And on and on and on... In reality, it's rarely pure theoretical calculus that's being done. Rather, another branch of math based on and built from the principles and results of calculus is primarily used called differential equations. Don't forget integration, the other "half" of calculus. That is as equally important in your listed applications. Also, both theoretical and applied calculus use both differentiation and integration. Differentiation isn't a separate branch of maths, but one of the two major branches of calculus as a whole.
shopping, travel, measurements and money are the real life applications of real number system.
It's NOT
some application of trignomentry
Yes if it was not practical it was not there. You can see the real life use on this link http://www.intmath.com/Applications-differentiation/Applications-of-differentiation-intro.php
There are no real life applications of reciprocal functions
in real life what are applications of alanlytical geometry
Maths, Buiseness etc.
There are many examples of daily life applications of real numbers. Some of these examples include clocks and calendars.
none
they are no uses
What are the Applications of definite integrals in the real life?
You'll find "real-life applications" of the quadratic equation mainly in engineering applications, not in sustainable development.