Question

Câu 32 vs câu 33 giúp tuii dớiiii

Answer 1

32.

\(P=sin^2a+4cos^2a=1-cos^2a+4cos^2a=1+3cos^2a=1+3.\left(-\dfrac{1}{3}\right)^2=\dfrac{4}{3}\)

33.

\(A=\left(-\infty;3\right)\Rightarrow C_RA=[3;+\infty)\)

Answer 2

32A

33D