Introduction The Cosine Rule involves two main equations, A2 = B2 + C2 – 2BC Cos α, which is used to find one unknown length if the other two are known, and Cos α = ( B2 + C2 – A2 ) ÷ 2BC, which is a rearrangement of the previous, and used in order […]
Introduction The Cosine Rule involves two main equations, A2 = B2 + C2 – 2BC Cos α, which is used to find one unknown length if the other two are known, and Cos α = ( B2 + C2 – A2 ) ÷ 2BC, which is a rearrangement of the previous, and used in order […]