gaokao 2018 Q16

gaokao · China · national-I-science 5 marks Addition & Double Angle Formulae Function Analysis via Identity Transformation

Given the function $f ( x ) = 2 \sin x + \sin 2 x$, the minimum value of $f ( x )$ is $\_\_\_\_$

$- \frac { 3 \sqrt { 3 } } { 2 }$

Given the function $f ( x ) = 2 \sin x + \sin 2 x$, the minimum value of $f ( x )$ is $\_\_\_\_$