SIN2 TAN2 COS2 0 Π X− − =  (KH Ố I D_2003) 2 4 2ÐS

23. - DE THI LUONG GIAC TRONG CAC DE THI DHCD TU 2002 DEN 2012 CODAP
DE THI LUONG GIAC TRONG CAC DE THI DHCD TU 2002 DEN 2012 CODAP

23. sin

2

tan

2

cos

2

0

 

π x

− − =

  (Kh ố i D_2003)

2 4 2

ðS: 2 , , ( )

π π π

x k x π k k

= + = − + ∈ Z

4