CHO Y = 4TANX + COTX , ∀ X ( 0 ; Π2 ) THÌ A/ Y 6 B/ Y 10 C/ Y 8 D/ Y 4

câu 22: - LUYEN THI TRAC NGHIEM LUONG GIAC
Lớp 11 Toán LUYEN THI TRAC NGHIEM LUONG GIAC

Câu 22: Cho y = 4tanx + cotx ,

∀

x

( 0 ;

π

2

) thì

a/ y

6 b/ y

10

c/ y

8 d/ y

4