gaokao 2020 Q7

gaokao · China · national-I-science 5 marks Trig Graphs & Exact Values

Let the function $f ( x ) = \cos \left( \omega x + \frac { \pi } { 6 } \right)$ on $[ - \pi , \pi ]$ have a graph as shown. Then the smallest positive period of $f ( x )$ is
A. $\frac { 10 \pi } { 9 }$
B. $\frac { 7 \pi } { 6 }$
C. $\frac { 4 \pi } { 3 }$
D. $\frac { 3 \pi } { 2 }$

Let the function $f ( x ) = \cos \left( \omega x + \frac { \pi } { 6 } \right)$ on $[ - \pi , \pi ]$ have a graph as shown. Then the smallest positive period of $f ( x )$ is\\
A. $\frac { 10 \pi } { 9 }$\\
B. $\frac { 7 \pi } { 6 }$\\
C. $\frac { 4 \pi } { 3 }$\\
D. $\frac { 3 \pi } { 2 }$

Paper Questions

Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9