The range of \[f(x)=\cos 2x-\sin 2x\] contains the set [IIT Screening]

1.	The range of \[f(x)=\cos 2x-\sin 2x\] contains the set [IIT Screening]
A.	[2, 4]
B.	[?1, 1]
C.	[?2, 2]
D.	[?4, 4]
Answer» C. [?2, 2]

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The range of \[f(x)=\cos 2x-\sin 2x\] contains the set [IIT Screening]

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