Proof of Cosine Rule - Grade 11 

Wow you've made it Sooo easy for me😊😊

❤❤🎉thanks for the information God bless you

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

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

Took this one video to understand !

Thank you so much this was really helpful❤

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

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

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

Thanks my favourite uncle🤍