Calculate angle ABC, area ABC and shortest distance from B to AC. 2021 paper 2 Trigonometry.

#cosinerule
#trigonometry
#trigarea

[@MikeNgandu-ob4jn]

You're really gifted with wisdom sir

[@LawrenceAmeyaw-hj2vl]

Please I did not understand the last part did u mutiply the variable and constant together

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This channel has been extremely helpful in understanding math

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I like the way you are explaining and it's vert easy to understand.God bless you sir

[@user-wq7eb1wf8w]

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[@MunyanezaVenuste-ov4km]

I don't under stand sir why you using formul for b

[@fatormaamadu345]

To answer your question, this can be applied to any of the letters depending upon your choice not only b

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[@BrendahMutumba]

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[@LionNkah]

Thank you sir u are the first teacher that teaches math and I understand

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[@user-yd1xm7ti7s]

Job well done sir

[@ClaudineMapiche]

You are powerfull

[@lavenderachieng8154]

Enjoy the show 😅😅

[@farhansadik5423]

Found two ways while looking at the thumbnail, either use c^2=a^2+b^2-2abcos(theta) and solve for theta, or do the easy way and solve using law of sine

[@RebeccaMukuka]

❤❤❤❤❤❤

[@SamuelGabrielKodi]

Indeed u r the grt teacher may God almighty grant you more thank u sir

[@EstherMusonda-np5ee]

Thanks have enjoyed a lot

[@GraceChomba-p3n]

Sir you have helped me a lot thanks

[@heriseasy211]

Sir at calculating area it took me straight to the answer after the second step so i didn't divide with 2 at finding area to go to the final answer the calculator that iam using is from phone.now question was how will i know am i still gonna divide with 2 if i have a significant calculator....i currently don't have a one that's why I'm using this one

[@user-wq7nd6ud8b]

1/2*acsinB 2 it's in the formula.e.g 1*7.2*11.5 sin 105.4=79.82709947/2 from the formula hope have tried

[@PeterNsama-mw9mt]

sir i cant understand why you used sine at area of triangle why not cose😄

[@ChipegoChikanta]

Yes why we use a sin at area of a triangle❤

[@BritahFodens-dh3fx]

Sir why are u using cos instead of sin

[@sirgodyjahome6180]

​@@BritahFodens-dh3fx When you are given all the sides of a scalene triangle without a single angle, cosine rule is the most exceptional formula to obtain any first one angle of the triangle. After finding the first angle you can use either sine rule or cosine rule to find the other two angles.
As for the area, he used the sine rule for calculation but he would as well use the half perimeter rule since we have all the sides of triangle.
Half perimeter rule as I call it = {√s(s-a)(s-b)(s-c)} ; where √ = square root symbol, s = half the perimeter of the triangle, a,b,c are sides of the triangle and perimeter of the triangle=a+b+c.

[@ChansaRichard-ry1hi]

Keep it up sir

[@ChrisWisdom]

It's because it's an angle

[@TawandaBarure]

That's great

[@user-qb1ub5ve2w]

Sir ndimafuna mundithandize vector imeneyi ili pa paper 1 ya st.mary's 2021 please ndiya vector algebra koma yopanda midpoint

[@SondashiMutembo-t8y]

Good work

[@rubbendzidefo2245]

I really enjoyed this man's explanation and teachings,but it seems I got confused when he was solving the first question( the diagram question)it looks complicated for me, but well thanks

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[@YaazidRashid]

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[@user-td5fm5lv1i]

This is very helpful

[@TwinBless]

Thank you for helping understanding well

[@user-lv3kc9hy7o]

Sir we're very grateful 🙏🙏
Continue helping us

[@NatashaMubanga-j7b]

😮 since I was taught at school I thought this was hard and I didn't understand it. Thanks for making understand the concept now 😊🧠

[@Nova-vv7no]

That's great

[@user-zr4zs3ig7k]

Do we put metres squared on the shortest distance

[@NICKY-nx9gj]

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[@Chxwanzi]

Thank you for the video coach Jacob

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I like it your explanation what about other subjects like science, civic education and food and nutrition

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Thank you Sir am enjoying your lesson

[@user-qp3fc5ll7t]

Thanks a lot sir

[@fatormaamadu345]

This man is naturally gifted

[@RoseChiya]

I am slowly understanding maths, we want physics too?🙏🙏💓

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This is really helpful thank you sir

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[@IsataKonneh-ou8iz]

ICAN UNDERSTAND YOUR EXPLANATION BUT YOU ARE A GOOD AND BEST TEACHER

[@user-ed1wh2qr7j]

I noticed that in the other session he used this fomula a^2=b^2+c^2-2bc cosA
But he has changed the formula

[@user-ew8rr7pn7j]

Thanks you sir

[@user-ql8tp7sg7c]

Mwalipa baneni Na knowledge 🎉❤

[@KabsonSililok.m.e]

Is there any formula to use apart from that......?

[@user-xc4ui2qi7k]

Thanks for helping me to understanding the questions

[@BennyLukwesa]

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[@trynesschanda4730]

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[@OsundeyiDolapo]

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[@JackSiame]

Am enjoying

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Awe I'm very grateful to sir coz this is amazing.

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[@GladlySamakayi]

But sir calculator is not allowed in an exam room so I can't understand 😢😢

[@BridgetBen-wj4pu]

This is paper 2 and calculator is allowed

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I wish I you could be my teacher since primary level

[@YongoNamwinga]

20:05
Ur ability to explain complex concepts in a simple way is impressive 💯👍

[@MevisChileshe]

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[@LydiaSinkala]

I have understand 😄🎉❤

[@SamKiplangat-nt5kk]

Thanks to you Sir..,

[@uyosakala4880]

Thanks for your kindness sir

[@laisonmulauli2433]

Sir I didn't understand on simplify how have cancelled the numbers

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You had done well,
I'm from Nigeria ,
Preparing for next year jamb ,
I need to well prepared in math, chemistry and physics,
What do do coz I loved the way are teaching

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Please bi need help I last wrote my G 12exams in 2007, and my head is blank, I want to write math next year 2025

[@ErastusHainane]

Thank you sir God bless you

[@OrisonJerrypaul-pl1vf]

Sir please in your last question solved,
What happened to the y squared on denominator,

[@ChristopherMutanti]

I understood Sir thanks 🙏 may God bless

[@DavidKapalu-ec5cy]

Nice

[@fatormaamadu345]

Absolutely right 👍

[@CostenDax]

Sir on the equation how can u know that u have to add or subtract 🤔🤔

[@user-qp1rg5qo6e]

Thank you sir for teaching us God bless❤

[@JaneKaruga-yi2re]

Sir can I ask you a question where is 165.6 coming from 😢

[@JaneKaruga-yi2re]

Sorry negative 165

[@AlicePhiri-e6d]

Sir please can you please bring other question because I didn't understand

[@JozyNakiganda]

Sir why did u first use cos how do u determine it

[@bridgetmulunda1700]

I really enjoyed thanks sir❤

[@Kayimajosiah]

Thax for da grt concepts sir❤

[@CatherineMvula-zj8jw]

Please also do question (b) please 👏

[@BritahFodens-dh3fx]

Is that the general formula of finding the height

[@mercysakala-wl9kx]

What if you've been given 2sides with no angles in side it's cosine rule

[@ClementSichali]

Thank you sir for making me understand

[@DorothyAdia]

I can't understand 😢

[@ChristopherKofiBanafo]

I want more information

[@TalentMweene]

Wonderful teaching

[@VaheuaviTjinanaa]

Where did you get sin while we have Cos