Use a Graphing Device to Find the Maximum and Minimum $y = \cos x + \sin 2 x$

Multiple Choice

Use a graphing device to find the maximum and minimum values of the function $y = \cos x + \sin 2 x$

A) maximum value: $1.1$
, minimum value: $- 1.1$

B) maximum value: $- 1.1$
, minimum value: $- 0.76$

C) maximum value: $1.76$
, minimum value: $- 1.76$

D) maximum value: $2.76$
, minimum value: $- 2.76$

E) maximum value: $1.5$
, minimum value: $- 1$