CÂU 18.3 6  +  +  + A) TAN 2 ÷ ÷ ÷ ÷X Π6X Π6  B) COT 2X...

Câu 18.3 6  + A) tan 2 ÷x π6  B) cot 2x π3  D) os 2x+c  π6  C)sin 2