Question

What is Cosine rule's formula write in brief and the best will be marked brainliest.please give the answer fast.

Answer 1

Hi ...dear... here is your answer...
let a triangle whoes sides are a,b,ç and angles are A, ,B ,Ç...as shown in figure..!!!!
See picture for further solution!!!!
here AD is perpendicular to BC........
.....
hope this helps you!!
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