CHỨNG MINH 0 0 0 0 8 3 0TAN 30 TAN 40 TAN 50 TAN 60 OS203 C

3) - KIEM TRA TONG HOP BAI SO 23
KIEM TRA TONG HOP BAI SO 23

3) Chứng minh

0 0 0 0

8 3

0

tan 30 tan 40 tan 50 tan 60 os20

3 c