Area of a Triangle in Trigonometry - Formulas, Examples & Proofs - [2-20-13]

[@simpleman283]

This video is a GREAT follow up to your proof on the Law of Cosines video. I spent 6 days working on that proof. I learned so much, but I also knew I need to figure all the stuff in this video. I'm so glad you put this together, because my brain is very tired & I just want to celebrate finally understanding the Law of Cosine proof. Thank You very much. edit: the reason it took me so long, was I did not use the foil method. I solved inside the parentheses before squaring. Which allowed me to see that the oblique triangle was being made into two right triangles.

[@dancinwithshepa5932]

really enjoying your lessons. very easy to understand things that never interested me in school.

[@karimaakriche3544]

You are a Star you covered everything it's really helpful from your video I can understand all about area of triangle

[@vascobishop3359]

A proper teacher.

[@mogeegee8365]

You're the BEST!! 🇿🇦

[@karimaakriche3544]

Amazing teacher thank you so much

[@ranujain4113]

The clearity is soo nice like no doubtt

[@gamer153-cq3fh]

okay

[@abdullahalmamun5671]

Wow, thanks. Bangladesh 🇧🇩🇧🇩🇧🇩

[@tresajessygeorge210]

THANK YOU... SIR...!!!

[@and4563able]

When will these lessons be posted on the website?

[@shourovshil4139]

Great teacher I have ever seen Thank you sir We love from Bangladesh 🇧🇩

[@krislegends]

About the first example, I am confused. Shouldn't height be 32*sin(72), with 72 coming from 180-108?

[@simpleman283]

The Sin of 72 is the same as the Sin of 108 or the Sin of -252. There is an infinite number of angles w/same Sin vale. He has a video on the "Unit Circle" that will clear up any confusion. Very very good video.

[@krislegends]

@@simpleman283 thanks for replying. I did watch his video on the unit circle, but I didn't learn that two different sin angles can have the same value. What I learned was that a sin value and a cos value can be the same, as in sin(90)=cos(0). Can you please direct me to material that explains things clearer?

[@simpleman283]

@@krislegends Copy this & paste it in your youtube search bar. 08 - Calculate Sin, Cos & Tan w/ Unit Circle in Radians - Part 1 I never knew how much there really is to a triangle when I started studying it two years ago, but I have learned most of what I do know from this man right here.

[@simpleman283]

@@krislegends Also check this one out All 6 Trig Functions on the Unit Circle by: Beautiful Math

[@krislegends]

@@simpleman283 I will. 🙏

[@shobarani4160]

Good evening sir

[@waynenorris5657]

Could it be possible that the architects that designed the pyramids in Egypt used trigonometric function’s

[@elizabethsawyer4951]

I get A=8.3005

[@krislegends]

Is the base always the longest leg?

[@bolujojosephine]

Find the area of a triangle with

[@samburdge9948]

Hello, does anyone know a decent geometry textbook.......introductory Euclidean and Non-Euclidean........approximately 10th grade level...........thank you and gods bless

[@drumtwo4seven]

Nice 👍

[@gamer153-cq3fh]

no problem

[@gamer153-cq3fh]

yes

[@simpleman283]

19:45

[@Marusija8]

I am really enjoying from Jason lessons, but In this time I couldn't understand anything , he talks to fast ..

[@MathAndScience]

Sorry about that. Maybe slow down KZbin to 0.75?

[@abdullahalmamun5671]

Wow, thanks. Bangladesh 🇧🇩🇧🇩🇧🇩