Cosine rule || Trigonometry ||

[TomTom-ywpm]

There is a mistake!!
The angle you derived is ∠A not ∠B.
∠B=96.77°

[enerstkalenga]

Honestly speaking, sir you are so much of help. May God bless you. Sometimes I feel like following you twice 😂😂😂

[PaulinaChipola]

Thank u very much sir I really enjoy your teaching

[Pros]

Thankyou sir you are a blessing to many

[januaryzimba]

Fantastic teaching and i will stick to your lessons sr

[AliceKanche]

Sir I'm a bit confused is this also a correct fomular b^2=a^2+c^2-2a(2.5)cosb

[Alice-rz]

Thank you very much sir because you are helping me I'm very poor in math but because of you I'm catching up

[ClintonChipoya-sr]

Now what if you have been given two sides and an angle what could you use? Cosine or sine

[mpcephase]

But sir the angle they were looking for was B but you put A instead of B, why? Please I'm behind

[websterchileshe]

Sir, to have the right answer the formula to use is b^2=a^2 +c^2-2accosB

[NelmasKapema]

This man 😮😮😮you have a heart of dove♥️God bless you

[harrisontembo]

so when you start with b the answer is going to different.
you need to re-do this question sir

[princessmwanza-iotv]

Mr sichamba thank you for your lessons

[FabriceDoshim]

To sincerely with... This is absolutely wrong... Revisit the consent on cosine rule

[odettewankusi]

How you can see that is cosine rule which is needed to use?

[sandrakatongo-jzid]

This is good. I thought b is supposed to be infront since it's where the angle is
Eg:b =a+c=2_ac(2.5(1)cos B

[EdwardTembo-fb]

Mr sichamba you are really a help to us thank you and may God bless you more and more sir.