Expression 20: "L" Subscript, 1 , Baseline equals "M" Subscript, 1 , Baseline plus "R" cosine left parenthesis, 2tan to the negative 1st power 2 , right parenthesisL1=M1+Rcos2tan−12
equals=
22
20
Expression 21: "L" Subscript, 2 , Baseline equals "M" Subscript, 2 , Baseline plus "R" sine left parenthesis, 2tan to the negative 1st power 2 , right parenthesisL2=M2+Rsin2tan−12