式24: "S" equals 4sine left parenthesis, "s" , right parenthesis left parenthesis, 1 minus sin "s" plus cos "s" , right parenthesis left parenthesis, cos "s" minus tan left parenthesis, "s" , right parenthesis left parenthesis, 1 minus sin "s" , right parenthesis , right parenthesisS=4sins1−sins+cosscoss−tans1−sins