1: ( 1; ( -2; 0) : : - d qua A(1; 2) : 2( x – 1) – 3(y – ) = 2x – 3y + = 2: ( 1; : : : – d qua A(1; 2) – : – – Ho c em c th tr b kh c sau: - Đư th song song v d’ nên phương tr nh c d - Đ ( 1; ) thay v a đư : :c = : 3: ( 1; : : : – d qua A(1; 2) – – 0914915616 – – Ho c em c th tr b kh c sau: - Đư th vuông g v d’ nên phương tr nh c d : - Đ ( 1; ) thay v a đư : :c = : 4: ( 1; = : ( x0; y0 : : : 5: ( 0; b) (a : : : ( 0; -2) : 6: = : = = tan = tan : =1 – 0914915616 7: = : = = tan = tan = =1 : = -1 : 8: d’: = : : ;( ) : : cos = cos = ! : – d qua A(1; 2) – – : – 9: 1: 2: : ( x0 ; y0 ) : – 0914915616 - 1: k/c = - 2: k/c = : ) 10: ( C) : : : (Đ x đư ng th qua A v song song v c r ct ( C) đ nh ! ) : : =2 : : ! x !” – 0914915616 - : 0162.681.7075 – – – 0914915616