Prof. Raffi Hovasapian

Raffi Hovasapian took his first degree in Classics (Ancient Greek and Latin). He then took degrees in Mathematics and Chemistry. He is literate in 7 languages: English, Armenian, Greek, Latin, French, Italian, and German. When he was younger he also trained to be a professional Ballet Dancer.

AP Calculus AB Online Prep Course Advanced

Prof. Raffi Hovasapian

Professor Raffi Hovasapian will help you ace the AP Calculus AB exam in this video prep series. Raffi takes complex math concepts and distills them into easy-to-understand fundamentals that are illustrated with numerous applications and sample problems. He also walks through an entire real Advanced Placement test while dispensing useful test-taking strategies that will help you get that 5.

412 ratings & 32 reviews

AP Chemistry Online Prep Course Advanced

Prof. Raffi Hovasapian

Want to ace the AP Chemistry test? Join Professor Raffi Hovasapian in his time-saving prep course that will get you ready for the exam. Everything is covered with clear explanations, step-by-step examples, and a complete walkthrough of a previous Advanced Placement Chemistry exam.

645 ratings & 145 reviews

Biochemistry Online Course Advanced

Prof. Raffi Hovasapian

Biochemistry, the chemistry of biological molecules, explains the complex processes that sustain all living organisms. Professor Raffi Hovasapian helps you save time while thoroughly understanding these complex processes with clear explanations and worked out examples.

872 ratings & 68 reviews

Linear Algebra Online Course Professional

Prof. Raffi Hovasapian

Join Professor Raffi Hovasapian in his time-saving Linear Algebra online course that focuses on clear explanations with tons of step-by-step examples. Raffi brings even more enthusiasm as Linear Algebra is his favorite subject and he aims to make it understandable for all.

629 ratings & 53 reviews

Multivariable Calculus Intermediate

Prof. Raffi Hovasapian

Professor Raffi Hovasapian helps you develop your Multivariable Calculus intuition with clear explanations of concepts before reinforcing an understanding of the material through step-by-step examples. See why Dr. Hovasapian is one of the most loved instructors on Educator.

Physical Chemistry Online Course Intermediate

Prof. Raffi Hovasapian

Join Professor Raffi Hovasapian in his Physical Chemistry online course as he explains chemical systems using the laws of physics. Each lesson starts out with Raffi breaking down the complex theories into manageable ideas and ends with several fully worked-out example problems.

739 ratings & 39 reviews

AP Calculus AB Online Prep Course 12

Prof. Raffi Hovasapian

By Roy JiangJanuary 3, 2019
Hello Professor Raffi,

I was just wondering if it was any coincidence that in example V, if I took Pi*30.4^2 - Pi*29.6^2 and divided the answer, I would get the possible error in area? And is this a valid way to approach a question like example V?

Thank you,

By Magic FuJuly 7, 2018
Thank You so much!!!!
My textbook sucks, it has zero practice problems and examples.
Lucky, I found your AP Calc AB videos, and I got 5 on my Calc BC and Calc AB exams.

(Also, I took AP Chemistry exam last year, but I ended up with a 4, which I am still very salty about that).
By Patricia XiangApril 28, 2018
Thank you professor, I have got the refund!

AP Chemistry Online Prep Course 12

Prof. Raffi Hovasapian

By Riley ArgueOctober 13, 2012
Dr. Hovasapain is the best teacher you will ever find ;)
By Sama AlsaadiDecember 2, 2018
Hi prof, this video stills not working; it stops at the middle. Could you please try to fix this issue? Many thanks for your great effort.

By Amy ZhangJanuary 15, 2018
Thank you so much! Also, can you please specify which topics you left out so I can remember to work on those after I finish your course?

Biochemistry Online Course 12

Prof. Raffi Hovasapian

By Roxanna AllameyMarch 20, 2013
By Jason SmithJuly 31, 2015
You should receive teacher of the CENTURY award
By Jenika JavierSeptember 12, 2014
Thank you so much!!

Linear Algebra Online Course 15

Prof. Raffi Hovasapian

By Levon GuyumjanOctober 11, 2017
I truly enjoy your explanation, is detailed and very clear. Thank so much
By John LinsJanuary 31, 2017
You are the best!! Thank you. I am emailing you now.
By Growth Mindset BelieverApril 3, 2016
Thanks for the great response.  I let my subscription lapse which is why I haven't seen your response until now, but I'm back to enjoy your videos and others on this site again since I'm taking a data science course right now which uses a lot of concepts from linear algebra.

Multivariable Calculus 8

Prof. Raffi Hovasapian

By marc georgeJune 24, 2017
Hi, Raffi. Fantastic lecture as always, sir. If I wanted to contact you directly, what is an email that I can reach you at? Thank you as always!
By Mohsin AlibrahimAugust 3, 2016
Hello Professor Hovaspian,

First of all thanks for the wonderful lecture

In  Example 3 is it a coincidence the (x+1/2) = (x-x0/y0) and the same question goes for (y-2/6) ?
By Hen McGibbonsNovember 25, 2015
potential function lectures have been great. was beyond confused with what was going on in class and then watched these lectures. everything clicked

Physical Chemistry Online Course 8

Prof. Raffi Hovasapian

By Kimberly January 22, 2019
The explanation is awesome, thank you professor!
By Kimberly DavisNovember 26, 2018
In the section Three miscellaneous example problems, example I, you wrote the Cp in term of J/g KELVIN unit, but you solved the problem as J/g Celsius. Does it  matter which unit I use for this? Thank you!
By Mir afzal KhanNovember 25, 2018
hello , sir

i have question about 3rd example .
its given in the example 110 kPa  in the solution you wrote it down 100 kPa could you explain me these steps in little bit more detail , i will be very thankful to you sir

Please sign in to participate in this lecture discussion.

Resetting Your Password?

Start Learning Now

Our free lessons will get you started (Adobe Flash® required).
Get immediate access to our entire library.

Membership Overview

  • Available 24/7. Unlimited Access to Our Entire Library.
  • Search and jump to exactly what you want to learn.
  • *Ask questions and get answers from the community and our teachers!
  • Practice questions with step-by-step solutions.
  • Download lecture slides for taking notes.
  • Track your course viewing progress.
  • Accessible anytime, anywhere with our Android and iOS apps.