Grade 12 Trigonometry Lesson 5| Compound angle identities

[@nomfundoasiphe5629]

With my exam being tommorow ,this was a last minute save thank you so much Malume👌

[@lumkaqhineka5598]

I got 1 as the answer
This was a good lesson thanks

[@MlungisiNkosi]

You’re so welcome… Thank you

[@aflvme]

same

[@jetrothamsanqa1532]

I just got sin(90) = 1😄 sir
This is my first time proven these identity correct 😄
I can't wait to keep on improving my Math & Science with you sir 😃
The way your explain things it's easy to understand

[@MlungisiNkosi]

Wow!!! This is incredible… Keep going!!!

[@beatalabercensie545]

You're exceptional. Thank you so much sir Mlu 🙏🙏

[@MlungisiNkosi]

My pleasure

[@MichaelMakamu-sy4rs]

=sin(8°+82°)
=sin(90°)
=1
That's the answer I got

[@Mmimphow_]

I just did the question and my answer was cos(101-49) i.will make sure I get it right and thank you for your help I'm the newest member of the family and I'm already understanding alot🙃

[@MlungisiNkosi]

Welcome to the family 🥳🥳🥳🥳🥳🥳

[@theoriginalmahlobo]

Thank You So Much Sir, You don't even make Maths Sound Easy! You literally Make It Easy 🥺❤️‼️, I Wish I discovered this Channel While I was still in High School 😭, But then It's fine you're still helping after High School 😜❤️😁

[@ThusoTshiping-iw9ex]

Ka nnete

[@carlavanrooyen340]

my answer is sin90 = 1. is that correct?

[@MlungisiNkosi]

Awesome 👏🏾

[@bolanlelaleye8401]

Yes its correct

[@LindiweMpanza]

How did you get 1
Show me plz

[@_qhama_mtwetwe]

@@LindiweMpanza put sin(90) in your calculator and your going to get 1

[@serogolemogole2685]

​@@LindiweMpanza 3 ways to get to the answer of sin90⁰.
1. Simply use your calculator as someone has alrdy stated.
2. Or, drawing from your knowledge of trig functions, use your standard sin function and you'll notice that the sin graph has a maximum value of 1 at 90⁰ within a 360⁰ period.
3. Lastly, when using your unit circle, you'll notice that sinx is always 1 when its radius is at excatly 90⁰.
Bottom line, use whatever method works best for you

[@thobekandlela7556]

Quick question. I know this was recorded a while back but can you please do corrections from previous video in the next video.
2. Regarding the one we have to do alone here, do we have to follow the rule of : what you do on the left hand side you do on the right hand side.
Thank you very much for your content by the way, it’s very helpful 🥺❤️

[@MlungisiNkosi]

I’m not quite sure I follow

[@iamtasha.4837]

@@MlungisiNkosi I think she referring to the question that you left us with before the end of lesson 4.

[@alungilengcameva6445]

@Thobeka Ndlela I think she meant to suggest that if you leave a question at the end of a video please do corrections of that question in the next video if not so I suggest it myself🙏🏾
Thank you for your content much appreciated and helpful @Mlungisi Nkosi

[@Thuto_638]

Sir , about the 2nd last question . The last one you did with us . I got sin(60) which still led to root 3 over a 2 . Is that still correct ? I said
Cos(90-11) . Cos(360-49) +Sin(90+11) . Sin49
Then got Sin11. Cos49 + Cos11 . Sin49
Which gave me Sin(11+49)
then Sin60 being equal to root 3 /2 . Correct me if I'm incorrect pls .

[@simbamarudza7735]

I got cos(0°) which is =1

[@MlungisiNkosi]

The stuff of genius 🤞🏾

[@estherondongo1744]

Hey sir by 17:57 for cos79 couldn't you reduce it to cos(90-11)

[@goodnessmabaso2315]

I got sin(90) =1 answer sir
It was a good lesson 👍🙏sir

[@MlungisiNkosi]

You’re most welcome 🤗 😃

[@owamidlamuka922]

Wena mfoka Nkosi siyabonga mfwethu.🙌🏽...

[@prudencemukwevho8083]

I'm finishing off too, I'm now getting there. Thank you Uncle.

[@MapasekaMolebatsi]

Sir how did you get over 4 on the first one?

[@phumelelemtambo2452]

😭 😭 Yho you are a plug indeed wish I discovered your channel earlier

[@MlungisiNkosi]

Wow… Thank you.

[@rotondwaangel62]

Sir for number 2
Why didn't we use cos20 and cos40

[@mthalimbali8899]

Sin on the 2nd last question. I got the same answer but from a different root. I changed cos to be sin and changed 79 to be (90-11) ,is that still fine?

[@MlungisiNkosi]

That’s perfect 🤩

[@franklin_morningstar]

At 11:00 instead of taking out a negative, would it be possible to just multiple by - 1 so the signs change?

[@ngcebopromisse]

MY question too

[@lekaneprimary1992]

=cos 8sin82 + cos 82 sin(180-8)
=sin 82 cos 8 + cos 82 sin 8
=sin(82 + 8)
=sin 90
1

[@mendrewmabuza]

The answer is 1.
Thank you so much for the lesson.

[@MlungisiNkosi]

You’re welcome

[@jessicahlungwani2349]

Wow thank you so much sir

[@MlungisiNkosi]

You’re welcome

[@kamogelomosetlo8580]

Thank you sir , sir please consider doing a mst meeting where we can interact with you please

[@matsoabolimojalefa9607]

its sin 90 sir so when i convert it it gives me 1

[@MlungisiNkosi]

Perfect

[@nokonotwane775]

Thank you very much sir, got sin90 just forgot to convert to 1

[@MlungisiNkosi]

That’s awesome

[@czeenfootballtv1005]

Thank you so much bhut Mlu..🙏

[@Fearless13289]

Sir when are u going to teach physical science on stream

[@MlungisiNkosi]

Please feast on the thousands of videos available on our playlist already

[@Fearless13289]

@@MlungisiNkosi Alright sir

[@Thuto_638]

And for the last one i got Cos(0) which is 1

[@PhathumudauPhathu]

My answer cos74 s it correct?

[@lareinejen8815]

Sin(90)
=1

[@MlungisiNkosi]

The stuff of genius 😊

[@ian_sambo04]

@@MlungisiNkosi i just got the same answer too😊

[@MlungisiNkosi]

@@ian_sambo04 awesome

[@jiggy_got_no_sauce]

Cos(8-8)
Cos(0)
=1❤

[@wisemzimkhulu683]

1 is the answer I got.

[@mogaukadishenkadimeng5089]

I got sin90
And I'm newest member of the family

[@MlungisiNkosi]

Welcome 🥳🥳🥳🥳🥳🥳🥳🥳
You’ve got it quite right

[@lucianmsimango5920]

My answer was sin 90 which is equal to 1.

[@MlungisiNkosi]

Awesome

[@KabeloKabelowthoka]

cos (8-8)=cos0 =1

[@clairepurdy7238]

Sin(82+8)
Sin(90)
=1

[@MlungisiNkosi]

How dope is that?

[@lulutime53780]

Sin(90) which is 1
That what I got as my answer

[@MlungisiNkosi]

Genius

[@sphesihleshabalala2390]

I got sin90 which means 1 thank you for a lesson you a good teacher i do understand when you are explaining thank you so much sir

[@TseboMotsa-TAG]

Here are my last 3 steps
= sin(82 + 8)
= sin 90
= 1
Months later, and this lesson is still relevant. Thank you bra Mlu, you're a true epidemy of black excellence📚⚠️🔥

[@MlungisiNkosi]

Thank you

[@jabulanimatingane8493]

sir,i got sin90 of which is giving me 1....thank you

[@MlungisiNkosi]

Well done

[@RobinHood-nt7hu]

Thank You Sir

[@MlungisiNkosi]

Most welcome

[@salathielmoyo5246]

I got cos(0°) is it correct

[@nonhlanhlamnisi1442]

Me too . Cos (0) =1
And the final answer is 1 as malume approved

[@ntetsanemonyepao6069]

Got it Sin(90)=1

[@MlungisiNkosi]

Awesome 🤗❤️

[@KatlegoMakhubela-o7j]

Sin90=1

[@thabangmakua2242]

Also got sin 90=1

[@MlungisiNkosi]

Awesome 😎

[@MulweliRamarada]

Sin90

[@kekelletsomoeti8358]

Thanks

[@MlungisiNkosi]

You’re welcome

[@witneyzulu8205]

I got 1 as a final answer

[@MlungisiNkosi]

Awesome

[@nqobile_Zuma]

Sin(90)=1 That What I Got

[@MlungisiNkosi]

Perfect

[@mildredagu8028]

My answer is sin 90= 1

[@MlungisiNkosi]

Excellent 😃

[@ntokozomazibuko6195]

sin 90 = 1

[@BradleyMaphuruma]

My answer is 1

[@gracemaria1696]

1 is the answer

[@MlungisiNkosi]

Great ☺️

[@itumelengjay]

My final answer is 2/2 = 1

[@itumelengjay]

Thank you sir🫂

[@MlungisiNkosi]

This is awesome

[@lisandwandwa790]

I dont understand how to solve this question

[@MlungisiNkosi]

You can always join our live online sessions for extra help. Email [e-mail]

[@WYGEE_WES]

1 is the final answer 😅

[@MlungisiNkosi]

Awesome!!

[@ZamyNgxongo]

I got 1 as an answer

[@nerrisapmamba6994]

My Answer Was 1

[@MlungisiNkosi]

Your answer is correct

[@jessicahlungwani2349]

My final answer is 1

[@MlungisiNkosi]

Awesome 👏🏾

[@dineoselepe3481]

1 sir

[@MlungisiNkosi]

Correct ✅

[@nqubekolive7792]

Got 1

[@MlungisiNkosi]

Awesome

[@AlakhiweAkhile]

I got 1 not zero

[@sunnyboymkhasibe9995]

it was sin(82+8) which is sin90= 1

[@MlungisiNkosi]

Beautiful 🤩

[@AlakhiweAkhile]

My answer is zero

[@czeenfootballtv1005]

Sin 90=1
Sin (82+8)

[@omphulusamadia]

Sin(90)=1

[@MlungisiNkosi]

Perfect