ĐƯỜNG TRÒN LƯƠNG GIÁC (hoàn chỉnh)

 ĐƯNG TRN LƯNG GIC                           !"            OP !"#$%&'( )*+,)#-./0123"45362$78+2+9'( :-#;:<9)2=>?@(,*.6'(#;AB@C D72E,!FGHIJKLFMN9)âm(,dương #$%& ' OP ( OP > < ) ) ' P ( P ) tg α  α OQ OM ' AHAH OA OQ  α AH ' OQ = OP PM OM ' OP ' BK OP OM BK OB  g α BK *+" !, "-& /0 !,12"1& /0 !,34"3& = = = = = = = = = = = =                             tg α = PM OP OQ OP   α α  g α OP PM OP OQ   α α = = tg α = = =  g α           OP("2+%                    OP OQ > ) M thuc ptư I: ) ) )  ) α > )tg α > )cotg α > AH BK >  ) α > > > ) ( π α < < .5678 » AB               ) M thuc ptư II: ) ) )  ) α > > ' P ' Q  ) α < ' OP ' OQ < ( π α π < < ' AH ' BK )tg α < )cotg α < < < ' H ' K ' M .5678 » BA ′               > ) M thuc ptư III: ) ) ) )tg α > )cotg α > >  ) α < < ( H ( K ( M ( P ( Q  ) α < ( AH ( BK ( OP ( OQ 9 ( π π α < < .5678 ¼ A B ′ ′ <               .5678 ) M thuc ptư IV: ) ) ) >  ) α > < )tg α < )cotg α <  ) α < 9 H 9 K 9 Q 9 P 9 OP 9 OQ 9 AH 9 BK 9 ( ( π α π < < » B A ′ 9 M < <