Apologies I made an error with the area formula by omitting 1/2
@tshepitshepi8659
2 жыл бұрын
Hi sir so this means the answer would be 18 units^2
@NontandoMbeje
Жыл бұрын
I recommend this channel to any matriculant
@MlungisiNkosi
Жыл бұрын
Thank you
@beatalabercensie545
2 жыл бұрын
So helpful. Thank you so much Mr Nkosi. May we reap the benefits of these online videos. Super grateful. 🙏❤️
@MlungisiNkosi
2 жыл бұрын
I hope you do...
@josephinabukelwakekana8799
Жыл бұрын
Thank you Sir for your help, and I was blaming myself for choosing this subject . I really appreciate your lessons
@MlungisiNkosi
Жыл бұрын
You are very welcome
@mphondambs
2 жыл бұрын
I'm I the only one struggling to understand how he got the angle B😭😭
@MlungisiNkosi
2 жыл бұрын
Those questions require an understanding of geometry as well… Are you sorted there by Geometry?
@boitumelomonaketsi9053
Жыл бұрын
So I just wanted to ask why do we have to construct rather than using the m of AB to find angle B??
@tshelemosia2042
11 ай бұрын
Hi sir can i ask for 1c why did you add the 9+36 to get 45 instead of punching the square root of 9+36 into the calculator to get 3 root 5?
@refiloekheswa937
11 ай бұрын
thought i made a mistake i am glad someone noticed
@Thuto_638
5 ай бұрын
For (c) i used sine rule to get angle C then got 36 , 87 then used the Area Rule that is ½absin(c) then got 18 units² . Mind you for (b) i used Cosine Rule so i calculated all of my length there so it was then easier to get (c) by just using them from there then ye . You are amazing Malume ❤❤.
@ndhlovuunathi2764
4 ай бұрын
yes i also got the same he made a mistake because the formula of a triangle is 1/2absin(c) he just forgot to add the half
@ntsitselelemirriam1116
2 жыл бұрын
Thanks a lot ,this video's are really helpful
@MlungisiNkosi
2 жыл бұрын
You’re welcome. Thank you for being part of the family
@siphosethulerato2428
2 жыл бұрын
Sorry sir, in that question of calculating angle B . Will it be fine if i calculate it in other method like calculating the distances of the lines that includes angle B which is line AB and CB then use cosine rule to calculate angle B?
@MlungisiNkosi
2 жыл бұрын
Yes you may
@angelmakhubo215
Жыл бұрын
And how much was your angle?
@tlhokomelomokoena105
2 жыл бұрын
So the angle of inclination is always the angle between the x axis and the line.So it doesn't matter if the line is by the negative x axis.Tan x=m works on both sides of the x axis as long as the angle is between the x axis and line?
@MlungisiNkosi
2 жыл бұрын
Correct
@comfortmakola
Жыл бұрын
Advantageous.Thanks a ton Sir .May you pls help in finding the area of a parallelogram🙏
@MlungisiNkosi
Жыл бұрын
Alright…
@Miliiiiiii315
2 жыл бұрын
I got 41.67⁰ for ange B
@elizabethsefoko4746
Жыл бұрын
Sir for angle B i calculated the lengths of all sides and after I used the cosine rule to find angle B but I don’t get the same answer I don’t understand
@boshybee7346
11 ай бұрын
same, i got 85.24
@Miliiiiiii315
2 жыл бұрын
Sir, with b, the angles add up to more than 180⁰
@MlungisiNkosi
2 жыл бұрын
I will look into it… It might be a slight error.
@dipe6376
2 жыл бұрын
Hello sir, is the area of triangle ABC not= 1/2AB.BCsinb
@MlungisiNkosi
2 жыл бұрын
Oops… I forgot the 1/2 hey. Sorry about that
@molemokhanye3418
2 жыл бұрын
Hi sir I did( b) differently but I got everything you got.
@MlungisiNkosi
2 жыл бұрын
That’s awesome 😎
@amzokafile4858
2 жыл бұрын
pls explain how you did B 🥹
@molemokhanye3418
2 жыл бұрын
@@amzokafile4858 I used the cosine rule
@amzokafile4858
2 жыл бұрын
@@molemokhanye3418 thank you 💗
@Sage_Green..
5 ай бұрын
@@molemokhanye3418 you are smart
@ntshemborikhotso9707
2 жыл бұрын
Thank you so much sir...God bless
@MlungisiNkosi
2 жыл бұрын
You’re most welcome 🤗
@koketsokekana9190
11 ай бұрын
sir with regards to 1b i dont understand how you got to the angle of 116.57° because i ended up with 109.52° although i typed in the same thing in the calculator. 15:15
@MlungisiNkosi
11 ай бұрын
Please make sure you calculator is in degrees
@Thuto_638
5 ай бұрын
Lol i went for the shottest way by using Cosine Rule and getting the very same answer 😂❤
@thatwasawesome551
2 жыл бұрын
We are close to 50k😁🙈🙌
@MlungisiNkosi
2 жыл бұрын
🕺🏾🕺🏾🕺🏾🕺🏾🕺🏾🕺🏾🕺🏾🕺🏾🕺🏾 Keep sharing!!!
@zamamvula8332
2 жыл бұрын
Hello Respected Sir, why in this case we use A as our second co-ordinate and B as our first?
@MlungisiNkosi
2 жыл бұрын
It really doesn't matter which one you start with. As long as you maintain the order on both co-ordinates
@zamamvula8332
2 жыл бұрын
@@MlungisiNkosi Bless you Sir.
@mbalenhlemthethwa7896
Жыл бұрын
Hello sir, do we always add 180 when get a negative angle?
@Sephorakankonde
Жыл бұрын
Yess
@jasonknows380
2 жыл бұрын
Can you please revise the grade 12 physical science term 1 test for 2022 Gauteng province
@MlungisiNkosi
2 жыл бұрын
Please send me a copy via email at info@mlungisinkosi.co.za
@jasonknows380
2 жыл бұрын
@@MlungisiNkosi okay sir
@josephmudau4242
2 жыл бұрын
Hii Please help me out,So Everytime I want an area of a triangle,I must use the sin rule. Having to sides and an included angel?
@MlungisiNkosi
2 жыл бұрын
Use the area rule
@AsandaNgcobo-pg1ff
Жыл бұрын
Im struggling to understand 1 b).
@MlungisiNkosi
Жыл бұрын
You’re welcome
@romeobradley9720
2 жыл бұрын
Sir for calculating area ..was it not supposed to be 1/2 ab.bc SinB?
@MlungisiNkosi
2 жыл бұрын
Askies… This old man has a tendency of making silly errors. I sincerely beg your pardon 🤗
@flexace768
2 жыл бұрын
@@MlungisiNkosi Sir I personally think you should pin 📌 this comment 😉 coz not including 1/2 confused thr whole equation
Пікірлер: 60