Proof of Cosine Rule - Grade 11

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[@EsihleMncwati]

Wow you've made it Sooo easy for me😊😊

[@GatsheniBoya]

❤❤🎉thanks for the information God bless you

[@omosatshuputsi]

thanks for the video sir, please try to use brackets when substituting , because it causes confusion here and there. 🙏🙏

[@MlungisiNkosi]

Ok next time

[@user-lp9hl2nw8h]

But why did you say “or rather + 2 a” instead of - 2a?

[@ukhulemahlasela4000]

It’s the formula

[@tuelongakane7659]

Took this one video to understand !

[@MlungisiNkosi]

Thank you ☺️

[@PatienceSibanyoni-g1p]

Thank you so much this was really helpful❤

[@MlungisiNkosi]

I'm so glad!

[@AyathandwaK67]

Thank you uncle, can you please please do trig f(x)

[@muanotv]

Thanks my favourite uncle🤍

[@MlungisiNkosi]

You’re welcome ☺️

[@EldrigeMahlangu]

Sir can you please help me on the other side alone?

[@user-lp9hl2nw8h]

Sir must we know how to prove for personal reasons?❤

[@MlungisiNkosi]

If you’re in grade 11, you must know how to prove because it is examinable

[@johannesmakuwa8236]

@@MlungisiNkosi what about grade 12 sir